If you’re comparing the TOTO Neorest LS vs AS, you’re already shopping at the top of the smart toilet market — and the right pick could change your bathroom forever.
These two integrated bidet toilets share a lot of DNA, but they differ in ways that matter depending on your bathroom and priorities — and this guide breaks it all down for you.
| Feature | TOTO Neorest LS | TOTO Neorest AS |
|---|---|---|
| Image |  |
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| Model Number | MS8732CUMFG | MS8551CUMFG |
| Dimensions (L x W x H) | 28.5″ x 16.125″ x 20.875″ | 27.25″ x 15.25″ x 21.375″ |
| Flush System | 1G TORNADO FLUSH (1.0 / 0.8 GPF) | 1G TORNADO FLUSH (1.0 / 0.8 GPF) |
| EWATER+ Coverage | Wand, bowl & under-seat | Wand, bowl & under-seat |
| Trim / Remote Options | Silver, Nickel, or Black trim + matching remote | Standard remote (no trim options) |
| User Presets | 4 | 4 |
| Wash Modes | Front, Soft Rear, Rear, Oscillating, Pulsating | Front, Soft Rear, Rear, Oscillating, Pulsating |
| Warranty | 3-Year Limited (Residential) | 3-Year Limited (Residential) |
| Buy Now |  |
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1. TOTO Neorest LS Dual Flush Integrated Bidet Toilet
The Neorest LS is TOTO’s most design-forward integrated toilet — a unit built for buyers who want to make a statement in a modern bathroom.
Its distinctive linear silhouette, sharp straight edges, and optional metallic trim accents in silver, nickel, or black set it apart from every other toilet in TOTO’s lineup, including the AS.
It replaced the beloved Neorest 700H and brought with it several upgrades: EWATER+ coverage extended to under the seat, 4-user personalized memory settings, a seamless seat design, and a removable lid for easier deep cleaning.
Features
- Dimensions: 28.5″ L × 16.125″ W × 20.875″ H
- Dual flush: 1.0 GPF / 0.8 GPF via 1G TORNADO FLUSH
- CEFIONTECT glaze + PREMIST bowl coating before each use
- EWATER+ sanitizes wand, bowl, and under-seat after every use
- Instantaneous warm water heating — never runs cold
- 5 wash modes including oscillating and pulsating
- Auto open/close lid, auto flush, heated seat (5 levels), warm air dryer (5 levels)
- Integrated nightlight, O2 air deodorizer, 4 user presets
- Decorative metallic trim + matching remote in silver, nickel, or black
- ADA compliant, Universal Height (floor to seat: 17-5/16″)
- 3-year limited residential warranty
Pros
- Most visually distinctive toilet in the Neorest lineup — genuinely stunning in a modern bathroom
- Slightly wider and longer footprint means a more spacious seated feel
- Matching trim and remote options let you personalize to your decor
- CLEAN LIFT design makes top-unit cleaning much easier than older Neorest models
- Identical hygiene technology to the AS — no compromise there
Cons
- Commands a higher price than the AS for what is primarily a design upgrade
- Slightly heavier and takes up a bit more floor space
- No side access panel (unlike the RS), but CLEAN LIFT compensates
If aesthetics are part of your buying decision — and at this price point, they almost always are — the Neorest LS is simply in a different class when it comes to bathroom presence.
You can learn more about how it stacks up against other high-end options in our guide to the highest-rated bidet toilets.
Check its current price on Amazon
2. TOTO Neorest AS Dual Flush Integrated Bidet Toilet
The Neorest AS is TOTO’s premium-tier integrated smart toilet that delivers the full Neorest feature set at a more accessible price point than the LS — and it’s the model that most buyers end up choosing.
It replaced the Neorest 700H alongside the LS and brought meaningful upgrades: a seamless seat design for easier cleaning, EWATER+ coverage extended to under the seat, and 4 user presets across the board.
The AS shares the same TORNADO FLUSH system, PREMIST bowl coating, CEFIONTECT glaze, auto open/close lid, auto flush, and fully adjustable bidet seat with the LS — the difference is almost entirely in footprint and aesthetic presentation.
Features
- Dimensions: 27.25″ L × 15.25″ W × 21.375″ H
- Dual flush: 1.0 GPF / 0.8 GPF via 1G TORNADO FLUSH
- CEFIONTECT glaze + PREMIST bowl coating before each use
- EWATER+ sanitizes wand, bowl, and under-seat after every use
- Instantaneous warm water heating — unlimited supply
- 5 wash modes including oscillating and pulsating
- Auto open/close lid, auto flush, heated seat (5 levels), warm air dryer (5 levels)
- Integrated nightlight, O2 air deodorizer, 4 user presets
- Standard remote (no trim color options)
- ADA compliant, Universal Height (floor to seat: 17-1/4″)
- 3-year limited residential warranty
Pros
- Same full Neorest feature set as the LS — no meaningful hygiene compromise
- Slightly more compact footprint (1.25″ shorter, 0.875″ narrower) — better for tighter bathrooms
- More affordable entry point into the Neorest integrated toilet range
- Sleek modern design that looks stunning in contemporary bathrooms
- CLEAN LIFT allows easy access between top unit and bowl for maintenance
Cons
- No decorative trim or remote color options — the remote is standard
- Slightly less seated width than the LS due to narrower bowl
- The savings over the LS can feel minor at this price tier
If you’ve been comparing the AS to other high-end smart toilet options, our best toilets with bidet roundup covers how the Neorest AS stacks up against the competition.
And if you’re not sure whether a full integrated toilet is the right route versus a premium bidet seat, our bidet toilet vs bidet seat guide breaks down exactly what you gain and give up with each approach.
Check its current price on Amazon
Design and Footprint: Does the LS Actually Look That Different?
Yes — and this is the single biggest differentiator between these two toilets.
The Neorest LS pursues what TOTO calls “ultimate simplicity through linear design.” Its sharp, straight edges and angular silhouette leave a bold impression from every angle.
The AS, by contrast, has a softer, more organic contour — still clearly premium, but less of a design statement.
The LS also comes with your choice of decorative metallic trim in silver, nickel, or black, with a matching remote in your chosen finish — a level of personalization the AS simply doesn’t offer.
Footprint matters too.
The LS measures 28.5″ long × 16.125″ wide, while the AS is 27.25″ long × 15.25″ wide — the LS takes up about 1.25″ more front-to-back and is nearly 0.875″ wider.
That extra size gives the LS a slightly more spacious seated feel, but it also means you need to measure your rough-in and available space more carefully before buying.
Both require a standard 12″ rough-in, and both are ADA-compliant Universal Height designs.
Winner: TOTO Neorest LS — if you’re designing around a modern bathroom aesthetic, the LS is in a class of its own visually, and the trim/remote options are a meaningful personalization advantage.
Hygiene Technology: Is There Any Difference?
No — and this surprises most buyers who assume the LS must win here too.
Both toilets carry the exact same hygiene stack: PREMIST coats the bowl before every use, CEFIONTECT glaze prevents waste from adhering to the ceramic, TORNADO FLUSH power-rinses the bowl with 360° centrifugal force, and EWATER+ electrolyzed water mists the wand, the bowl, and under the seat after every use.
Both deliver unlimited warm water via instantaneous heating — there’s no tank to run cold mid-cleanse.
Both offer 5 wash modes (front, soft rear, rear, oscillating, pulsating), 5 levels of seat heat, 5 dryer temperature settings, and 4 user memory presets.
If you’re choosing between these two toilets on hygiene grounds, you’re essentially flipping a coin — they are identical in this category.
For a deeper look at what makes EWATER+ and PREMIST so effective compared to standard bidet cleaning systems, check out our bidet toilet seat comparison chart, which breaks down how integrated toilets compare to standalone bidet seats in terms of nozzle hygiene.
Winner: Tie — identical hygiene performance across every metric.
Installation and Space Requirements
Both the Neorest LS and AS require the same standard 12″ rough-in and a dedicated GFCI outlet.
Installation for both models involves two shipped components — the bowl unit and the top unit — and each arrives via LTL freight due to size and weight.
The AS is meaningfully lighter at 97 lbs combined, versus the LS at 112 lbs — a difference that matters during the physical installation, which typically requires two people regardless.
Both models include a backup manual flush in case of power outages, which is a practical safety net worth noting if your home experiences occasional power interruptions.
If you’re new to integrated bidet toilet installation and want to understand what the process involves, the handheld bidet vs bidet seat guide explains the broader bidet category differences, and our best bidets for existing toilets article is useful if you’re still deciding whether a full integrated unit is right for your bathroom setup.
Winner: TOTO Neorest AS — lighter, more compact, and slightly easier to maneuver into position.
Remote Control and User Experience
Both toilets use TOTO’s stick-style ergonomic wireless remote with 4 personalized memory settings — so multiple household members can each store their preferred wash settings and recall them instantly.
Where the LS pulls ahead is in the remote itself.
The LS comes with a remote that matches your chosen trim finish — silver, nickel, or black — creating a coordinated, intentional look that matches the toilet’s accent hardware.
The AS remote is standard plastic with no finish options.
For everyday use, the functional difference is zero — every control on both remotes is identical.
But for buyers putting this toilet in a luxury bathroom renovation, the matched remote on the LS is a detail that matters.
Winner: TOTO Neorest LS — matched trim and remote is a genuine luxury touch that buyers in this category appreciate.
Value: Which One Is Worth the Price?
At this tier of the market, “value” is a relative concept — both the Neorest LS and AS are serious investments.
The AS costs less than the LS for what is, functionally, an identical toilet experience.
If you’re the kind of buyer who genuinely cares about bathroom aesthetics — the kind of person who coordinates hardware finishes across fixtures — the LS premium is absolutely justified.
If you want the full Neorest experience and the best possible hygiene system without paying for a design upgrade you’ll barely notice day-to-day, the AS is the smarter financial decision.
Both carry TOTO’s 3-year limited residential warranty — well above the 1-year standard you’ll find on most heated bidet seats at lower price points.
If you’re still comparing integrated toilets to premium standalone seats, our breakdown of the bidet toilet vs bidet seat trade-offs is worth reading before you commit.
Winner: TOTO Neorest AS — better value for buyers who are prioritizing function over aesthetics.
Verdict — Which One Should You Buy?
Both the TOTO Neorest LS and AS are exceptional integrated smart toilets.
They share identical flushing, hygiene, bidet, and comfort technology — the differences are almost entirely visual and dimensional.
Buy the TOTO Neorest LS if…
- You’re designing or renovating a modern bathroom and aesthetics are part of the brief
- You want the ability to coordinate trim finishes across fixtures
- Your bathroom can comfortably accommodate the slightly larger footprint (28.5″ long × 16.125″ wide)
- You want the most visually distinctive toilet in TOTO’s lineup
Buy the TOTO Neorest AS if…
- You want the full Neorest feature set at a lower price point
- Your bathroom is tighter on space and the more compact footprint (27.25″ long × 15.25″ wide) is an advantage
- Trim colors and remote matching are not part of your buying criteria
- You’re focused on hygiene, comfort, and long-term reliability over visual statement
For most buyers, the AS is the right call — it delivers 100% of the Neorest hygiene and comfort experience, and the savings can go toward other elements of your bathroom upgrade.
If you’re still deciding between this tier and a flagship WASHLET seat for an existing toilet, our comparison of the TOTO C5 vs S7 and our Brondell Swash vs TOTO Washlet guide give you a clear picture of what you’d be stepping down to — and whether it’s worth it.
FAQ
Is the TOTO Neorest LS worth the extra cost over the AS?
It depends entirely on how much bathroom aesthetics matter to you.
The LS delivers identical hygiene and bidet performance to the AS — PREMIST, CEFIONTECT, TORNADO FLUSH, EWATER+, unlimited warm water, and 4 user presets are all the same on both models.
What you’re paying for with the LS is its angular linear design, the choice of decorative metallic trim in silver, nickel, or black, and a matching remote in your chosen finish.
If you’re doing a full bathroom renovation and coordinating hardware across fixtures, that premium is absolutely justifiable.
If you’re primarily buying for hygiene and comfort, the AS gives you everything you need at a lower price.
Can the Neorest LS and AS fit in a standard bathroom?
Both require a standard 12″ rough-in, which is found in the vast majority of North American bathrooms.
The key measurement to check is the front clearance — both need a minimum of 12″ from the finished wall behind the toilet to the center of the floor drain, plus adequate knee clearance in front.
The LS at 28.5″ long needs slightly more forward clearance than the AS at 27.25″.
Both are ADA-compliant Universal Height toilets, so seat height is comfortable for a wide range of users including seniors and those with mobility limitations — something our best bidets for seniors guide covers in more detail.
Both require a GFCI electrical outlet within 3.9 feet (the power cord length on both models).
What is EWATER+ and why does it matter on both models?
EWATER+ is TOTO’s system for electrolyzing tap water to produce a mild sterilizing agent — essentially turning ordinary water into a cleaning solution without any chemicals.
On both the Neorest LS and AS, EWATER+ automatically mists the bidet wand, the inside of the bowl, and the underside of the seat after every single use.
This means the toilet is actively cleaning itself between every visit, dramatically reducing both the effort and the frequency of manual cleaning compared to a conventional toilet.
EWATER+ is one of the reasons the Neorest line consistently ranks at the top of our highest-rated bidet toilet lists — no other technology in this category comes close for passive self-hygiene.
How does the Neorest AS or LS compare to a premium WASHLET seat?
A premium WASHLET like the S7 or S7A sits on top of an existing toilet and delivers most of the same bidet features — unlimited warm water, EWATER+ wand cleaning, PREMIST, 4 user presets, auto open/close lid, and more.
What the integrated Neorest gives you that a seat cannot is seamless bowl EWATER+ coverage at the same level as under-seat cleaning, the TORNADO FLUSH system designed specifically for the integrated bowl, a truly unified aesthetic with no visible seams or cords, and CEFIONTECT glaze on a purpose-built bowl.
The WASHLET seat route costs significantly less and is ideal if your existing toilet is in good shape.
The Neorest route is for buyers who want the definitive version of the smart toilet experience — a complete replacement unit built as one system.
Our bidet toilet vs bidet seat comparison covers this trade-off in full detail.
Conclusion
The TOTO Neorest LS and AS are two of the finest integrated smart toilets available anywhere in the world.
They share the same flushing power, the same hygiene technology, the same bidet performance, and the same 3-year warranty — the differences come down to design language, footprint, and trim customization.
If you want a toilet that doubles as a design statement — with coordinated metallic trim, a matched remote, and a bold angular silhouette — the LS is worth every penny of the premium.
If you want the complete Neorest experience in a more compact package and at a more accessible price, the AS is the smarter buy for the overwhelming majority of shoppers.
Either way, you’re investing in a toilet that will outlast, out-clean, and out-comfort virtually anything else on the market.
Still exploring your options?
Check out our full guide to the best toilets with bidet for a broader look at the integrated smart toilet market, or visit our bidet toilet seat comparison chart if you’re still deciding between an integrated unit and a seat upgrade for your existing toilet.
