If you’re comparing the TOTO Neorest RS, AS, and LS, you’re looking at three of the most advanced integrated smart toilets money can buy.
This breakdown gives you everything you need to pick the right one for your bathroom and budget.
| Feature | Neorest RS | Neorest AS | Neorest LS |
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| Model Number | MS8341CUMFG#01 | MS8551CUMFG#01 | MS8732CUMFG#01S/N/B |
| Dimensions (L x W x H) | 27-1/8″ x 15-1/4″ x 21-1/2″ | ~28″ x 15-1/4″ x 21-1/2″ | ~29″ x 16-1/4″ x ~22″ |
| Design Style | Soft, rounded organic curves | Angular, linear/modern | Sharp rectangular, dignified |
| EWATER+ Coverage | Wand + bowl | Wand, bowl + under seat | Wand, bowl + under seat |
| Remote Control | Plastic block-style | Metal stick-style | Metal stick-style w/ trim options |
| Trim Finish Options | Cotton White only | Cotton White only | Silver, Nickel, or Black |
| User Memory Presets | 4 | 4 | 4 |
| Flush System | 1G Tornado Flush (1.0/0.8 GPF) | 1G Tornado Flush (1.0/0.8 GPF) | 1G Tornado Flush (1.0/0.8 GPF) |
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1. TOTO Neorest RS (MS8341CUMFG)
The Neorest RS is the entry point into the current Neorest lineup, replacing the discontinued Neorest RH with meaningful upgrades including a seamless seat, four user memory presets, and a refreshed block-style remote.
Its defining characteristic is its organic silhouette — soft, flowing curves with no sharp corners that create a sense of serenity and work beautifully in a wide range of bathroom aesthetics.
Features
- Sleek one-piece skirted smart bidet toilet with 27-1/8″ × 15-1/4″ × 21-1/2″ footprint
- Seamless seat design eliminates dirt-trapping gaps from older Neorest models
- PREMIST automatically mists the bowl before every use; CEFIONTECT glaze repels waste
- Instantaneous water heater for continuous warm water — no tank to run out
- EWATER+ sanitizes the wand and toilet bowl after every use
- Auto open/close lid and auto flush for a fully hands-free experience
- Dual-action spray: oscillating and pulsating modes, plus front, soft rear, and rear cleanse
- Heated seat with 5 temperature settings; warm air dryer with 5 settings; O2 deodorizer
- 1G Tornado Flush — dual nozzle, 360° bowl coverage, 1.0/0.8 GPF ultra-high efficiency
- ADA compliant, Universal Height; requires 12″ rough-in; 120V GFCI outlet within 3.9 ft
Pros
- Most affordable entry into the current Neorest lineup
- Compact footprint ideal for smaller bathrooms
- Organic rounded design suits a wide range of décor styles
- Four user memory presets — upgrade from the two on the older RH
- ADA compliant with universal height at 17-11/16″ floor to seat
Cons
- EWATER+ does not extend under the seat (limited to wand and bowl)
- Plastic block-style remote feels less premium than the AS/LS metal remotes
- Only one color/finish option: Cotton White
- Less seat area than the AS and LS due to forward hinge placement
The RS is the smart pick if you want the full Neorest experience — hands-free operation, Tornado Flush power, and TOTO’s world-class hygiene technology — at the lowest entry price.
It’s particularly well-suited to smaller master baths or secondary bathrooms where space is at a premium, and its rounded profile works with both contemporary and transitional design schemes.
If you’re not yet sure whether a full bidet toilet is right for you vs. a high-end bidet seat, our bidet toilet seat comparison chart gives you a clear sense of where the Neorest lineup sits relative to washlet-style alternatives.
Check its current price on Amazon
2. TOTO Neorest AS (MS8551CUMFG)
The Neorest AS is the mid-tier model in the current Neorest range, succeeding the discontinued Neorest AH with two key upgrades: full under-seat EWATER+ cleaning and a premium metal remote.
Its angular, linear design language makes it a natural match for modern, contemporary, and minimalist bathrooms where a more geometric toilet silhouette ties the space together.
Features
- Compact footprint similar to the RS but with meaningfully more seat area (lid hinge is set further back)
- EWATER+ mists the wand, toilet bowl, AND under the seat after every use
- Premium two-sided metal stick-style remote control with 4 user memory presets
- Same PREMIST, CEFIONTECT, seamless seat, and auto-flush features as the RS
- Wide front cleanse mode for enhanced feminine wash coverage
- Dual-action oscillating and pulsating spray in rear, soft rear, and front modes
- Instantaneous water heater for endless warm water; warm air dryer with 5 settings
- 1G Tornado Flush, 1.0/0.8 GPF; ADA compliant, Universal Height
- Both bowl and side panels are vitreous china and plastic hybrid construction
Pros
- Under-seat EWATER+ adds a layer of sanitation the RS lacks
- Premium metal remote feels noticeably more refined than the RS’s plastic block remote
- More seat area than the RS thanks to the further-back lid hinge
- Sharp linear design stands out in modern and minimalist bathrooms
- Wide front cleanse mode is an upgrade over the RS for feminine hygiene
Cons
- Still only available in Cotton White — no trim color options
- Smaller seat area than the LS
- Priced higher than the RS for what are relatively subtle upgrades
- Side panels are plastic rather than the full-porcelain base of the LS
The AS hits a genuine sweet spot for buyers who want the hygiene advantages of full under-seat EWATER+ and the feel of a premium metal remote, but don’t need the LS’s larger seat or customizable trim finishes.
Its angular aesthetic makes it particularly compelling in bathrooms with straight-lined cabinetry, tile work, and hardware — spaces where the RS’s curves might feel slightly out of place.
If you’re building around a full TOTO bathroom design, also see our guide to the TOTO AP vs EP wall-hung toilets — a great read if you’re considering wall-mount options alongside floor-mount smart toilets.
Check its current price on Amazon
3. TOTO Neorest LS (MS8732CUMFG)
The Neorest LS is the flagship floor-mount model in the current Neorest lineup, replacing the discontinued Neorest 700H with a host of upgrades — and it’s the only Neorest that lets you customize the hardware finish to match your bathroom.
Its rectangular design, sharp lines, and choice of Silver, Nickel, or Black metallic trim make it the most architecturally intentional toilet in the range, built for bathrooms where every detail matters.
Features
- Largest seat area in the current Neorest lineup — approximately 1″ wider and 1″ longer than the RS
- Full-porcelain base construction (vs. plastic side panels on RS and AS) — more luxurious look and feel
- EWATER+ covers wand, bowl, AND under seat; seamless seat; auto-flush with closed seat option
- Decorative metallic trim and matching remote available in Silver, Nickel, or Black
- Premium metal stick-style remote with 4 user memory presets
- Wide front cleanse, rear, soft rear, oscillating, and pulsating spray modes
- Instantaneous water heater; heated seat with 5 settings; warm air dryer with 5 settings
- 1G Tornado Flush, 1.0/0.8 GPF; ADA compliant, 12″ rough-in; 120V GFCI required
- Nightlight, O2 deodorizer, and backup manual flush standard
Pros
- Most comfortable seating — widest, most spacious seat in the current lineup
- Full porcelain base looks and feels more premium than the RS/AS hybrid construction
- Trim color customization (Silver, Nickel, Black) sets it apart from all other Neorest models
- Complete EWATER+ coverage: wand, bowl, and under seat
- Auto Flush with Closed Seat option — ideal for households with children or pets
Cons
- Most expensive model in the RS/AS/LS tier
- Physically larger — make sure you have the floor clearance (21″ in front, 15″ on each side)
- Same core technology as the AS, so the premium is largely for seat comfort and aesthetics
- Does not include ACTILIGHT UV technology (that’s reserved for the NX2)
The LS is the right choice when you’re renovating a master bathroom and want a toilet that serves as an architectural statement — not just a functional fixture.
The extra seat space also makes it the most practical option for taller users or anyone who simply wants the most comfortable seated experience in the Neorest range.
For a look at how the LS compares to other top-rated integrated toilets on the market, our highest-rated bidet toilet guide covers the broader competitive landscape.
Check its current price on Amazon
Head-to-Head: Design and Aesthetics
This is the most immediately visible difference between the three models, and it goes deeper than just looks.
The RS has soft, rounded organic curves — think of it as the most “bathroom-neutral” option that blends easily into traditional, transitional, and contemporary spaces alike.
The AS takes a sharper, more angular approach — defined edges and a linear silhouette that works especially well in modern and minimalist bathrooms with clean architectural lines.
The LS goes furthest with its design: straight lines, sharp right-angle edges, and a rectangular form that TOTO describes as leaving a “dignified, edgy impression.” It’s also the only model with metallic trim options in Silver, Nickel, or Black, letting you match bathroom hardware like towel bars and faucet finishes.
Winner: LS — its aesthetic versatility and trim customization make it the most design-forward choice by a significant margin.
That said, if your bathroom skews traditional or transitional, the RS’s rounded form will actually complement the space better than the LS’s sharp geometry.
Head-to-Head: Hygiene Technology
All three models share TOTO’s core hygiene stack: PREMIST bowl misting before every use, CEFIONTECT ceramic glaze that prevents waste from adhering to the bowl, 1G Tornado Flush with 360° dual-nozzle coverage, and EWATER+ electrolyzed water sanitization.
The key split is where EWATER+ applies.
The RS sprays EWATER+ on the wand and inside the bowl after every flush — keeping the two surfaces most directly involved in cleaning thoroughly sanitized without any chemicals.
The AS and LS go a step further: they also mist under the toilet seat with EWATER+, treating the surface area that’s most often neglected during regular cleaning.
For context on why this matters, our bidet toilet seat comparison chart explains how EWATER+ works and how it compares to other self-cleaning approaches across different product categories.
Winner: AS and LS (tie) — the under-seat EWATER+ coverage is a meaningful hygiene upgrade that gives the AS and LS a clear edge over the RS in long-term cleanliness.
Head-to-Head: Seat Comfort and Size
This is one of the most practical differences between the three models, and it directly affects your daily experience.
The RS is the smallest — its lid hinge is positioned further forward, which reduces the usable seat area compared to the AS.
The AS gains seat area over the RS specifically because of its hinge placement: the hinge is pushed further back, opening up more room to sit comfortably even though the overall toilet footprint is similar.
The LS takes this furthest — it’s approximately one inch wider and one inch longer than the RS in overall seat dimensions, and the full-porcelain base (vs. the vitreous china + plastic hybrid of the RS and AS) adds to its premium, substantial feel.
Winner: LS — the most comfortable seating of the three, particularly beneficial for taller users or anyone spending more time seated.
Head-to-Head: Value and Pricing
The three models are priced at ascending levels — RS, then AS, then LS — and the pricing broadly reflects the hierarchy of features and seat comfort you’re getting.
The RS is the most compelling value play: you get the full Neorest experience (Tornado Flush, PREMIST, CEFIONTECT, EWATER+ on wand and bowl, auto-flush, auto-lid, four presets) at the lowest price point in the lineup.
The AS costs more for what are relatively subtle additions: under-seat EWATER+ and a metal remote.
Whether those additions justify the gap depends on how seriously you take total hygiene coverage — and how much you value the feel of a premium remote in daily use.
The LS commands the highest price, and its premium is more justified: the full porcelain base, the larger seat area, and the exclusive metallic trim customization are genuine differentiators, not just spec bumps.
If you’re debating whether to step up from a premium bidet seat to a full smart toilet, our guide on the best toilets with bidet gives you a full picture of the market to help calibrate the investment.
Winner: RS (value), LS (overall) — the RS delivers the best value per dollar; the LS justifies its premium most convincingly.
3-Way Verdict: Which Neorest Should You Buy?
Buy the Neorest RS if… you want the most affordable entry into integrated smart toilet living, have a smaller bathroom, prefer soft organic curves that blend with a variety of décor styles, and can live without under-seat EWATER+ sanitization.
It’s also the best pick if you’re buying a second Neorest for a guest bath or secondary bathroom and don’t want to spend flagship money on every room.
Buy the Neorest AS if… you want the hygiene upgrade of under-seat EWATER+ and the feel of a premium metal remote, you appreciate a sharper angular design, and your bathroom aesthetic leans contemporary or modern.
It’s the right call when you want to split the difference between RS value and LS luxury.
Buy the Neorest LS if… you’re renovating a master bath and want the most comfortable seat, the most design-forward look, and the ability to match your toilet hardware to the rest of your bathroom in Silver, Nickel, or Black.
It’s also the strongest pick if you’re a taller user or simply want the most spacious seating experience in the current Neorest lineup.
If you want a premium bidet experience without replacing your entire toilet, our guide to the best heated bidet toilet seats covers TOTO’s WASHLET lineup alongside other top-rated seats.
FAQ
Q: What replaced the TOTO Neorest RH and AH?
TOTO discontinued the Neorest RH and AH (along with the Neorest 700H) in 2023.
The Neorest RS replaced the RH, the Neorest AS replaced the AH, and the Neorest LS replaced the 700H.
All three successors add a seamless seat, upgraded four-user memory presets, and new remote designs, while the AS and LS also add under-seat EWATER+ coverage.
If you currently own an RH, AH, or 700H and are thinking about upgrading, the corresponding successor model is the natural step — though any of the three can replace any of the older units from a plumbing standpoint.
Q: Do all three Neorest models require the same rough-in?
Yes.
The RS, AS, and LS all require a standard 12-inch rough-in (measured from the center of the drain to the finished wall).
None of the three are available in a 10-inch or 14-inch rough-in variant, so confirming your bathroom’s rough-in measurement before purchasing is essential.
All three also require a 120V GFCI-protected outlet within approximately 3-4 feet of the toilet — if your bathroom doesn’t have one, budget for an electrician before installation.
Q: Is the Neorest LS worth the extra cost over the RS?
For most buyers, yes — but the reasons matter.
The LS earns its premium through three genuine advantages: the largest seat area in the lineup (ideal for taller or larger users), a full-porcelain base construction that looks and feels more luxurious, and the exclusive metallic trim customization in Silver, Nickel, or Black.
If none of those three things apply to your situation — your bathroom is modern-neutral, you’re an average-sized user, and trim color matching isn’t a priority — the RS delivers nearly identical core functionality for meaningfully less money.
For a broader perspective on where the Neorest sits in the luxury smart toilet market, our highest-rated bidet toilet guide covers the full competitive field.
Q: Can I use the Neorest RS, AS, or LS with a TOTO WASHLET+ compatible toilet?
No.
The Neorest RS, AS, and LS are fully integrated one-piece smart bidet toilets — the bidet seat is built into the unit, not a separate washlet attached to an existing bowl.
WASHLET+ compatibility applies to standalone TOTO WASHLET bidet seats (like the S5 and S7) that pair with compatible TOTO toilet bowls to conceal cords and hoses.
If you want a TOTO smart bidet experience without replacing your existing toilet, our best bidets for existing toilets guide covers the WASHLET lineup alongside other top-rated seat options.
Conclusion
The TOTO Neorest RS, AS, and LS all deliver the same core luxury experience: hands-free operation from the moment you walk in, PREMIST and CEFIONTECT bowl protection, Tornado Flush power, unlimited warm water, and EWATER+ sanitation technology.
The differences — design language, seat size, under-seat EWATER+ coverage, remote premium, and trim customization — are the factors that separate the right model from the other two for your specific situation.
For most bathrooms and budgets, the RS is the easiest yes: full Neorest experience, compact footprint, the most accessible price.
Step up to the AS when hygiene completeness and modern angular design are priorities.
Choose the LS when you’re building your ideal master bathroom and want the most comfortable, most customizable, most architecturally refined toilet in the current floor-mount Neorest lineup.
Whichever you choose, you’re investing in TOTO’s most advanced integrated toilet technology — the same engineering that’s set the global standard for smart bathroom design for over 30 years.
For more help navigating TOTO’s full lineup, see our bidet toilet seat comparison chart and our guide to the best toilets with bidet for a broader look at what’s available across all price ranges.
