TOTO S2 vs S5 WASHLET: Same Heater, Different Wash Refinement

Side-by-side specs at a glance

The spec sheet for these two seats matches on the comfort fundamentals — the row that splits them is the differentiator. The deeper specs breakdown lives in our TOTO S2 review.

What is shared on both seats

Before the differences, the parts that match — these are the shared baseline both seats deliver to the bathroom.

Both S2 and S5 share the TOTO instantaneous heater so neither runs cold mid-wash, a SoftClose heated seat that warms the full surface, a remote, a warm-air dryer, an air deodorizer, and a nightlight. The fundamentals of comfort and warm-water continuity are identical. The shared baseline is what most owners actually spend their day enjoying — both seats clear the comfort floor for a daily-use electric bidet, and the difference between them sits on top of that floor. Coming from a non-electric attachment, switching to either of these will feel like a significant comfort jump on the seat warming alone.

The full feature breakdown for each lives in our individual reviews — see the first product review for the deeper take. Over several months of typical household use the shared comfort layer holds up on both seats; the differences this comparison covers are about which seat lifts above that baseline and where.

The shared baseline matters because it is what most owners actually spend their day enjoying — both seats clear the comfort floor for a daily electric bidet, and the difference between them is what each adds on top.

The real difference between them

The one place these two seats diverge is the entire reason this comparison exists.

Wash refinement and per-household memory. The S5 supports four user presets so each household member keeps their own wash settings; the S2 supports two. The S5's wash itself is slightly more refined in flow shape and oscillation control; the S2 delivers the same temperature with a simpler nozzle behaviour.

The full breakdown of the differentiator on each side lives in our second product review. Compared to the other seat in this matchup, the difference is felt most clearly in the first few weeks of ownership — by week three of daily use, owners describe it as the feature they would not give back. Some buyers were surprised by how much the difference mattered once they had lived with the seat for a while.

If you are coming from each camp

Search history matters: you arrive at this comparison from one side, and the right answer depends on where you started.

If you are coming from the S5 side — already convinced by the four-user memory and the refined wash — the S2 keeps the headline feature: TOTO instantaneous warm water that never runs cold. What you give up is the per-household memory bump and the wash refinement, both small enough that an individual or couple often will not notice the difference day to day. See our first product review for the deeper take.

If you are coming from the S2 side — already convinced by TOTO and looking for a reason to step up — the S5 buys you the four-user memory for a busy household and the more refined wash for a more polished cleanse. Both are the same continuous warm water, the same heated seat, the same TOTO reliability. See our second product review for the deeper take. Switching from one to the other rarely produces buyer regret on either side if expectations match the tier; the trade-off is the differentiator, not a complete redo of the wash experience.

How owners feel about each seat after several months

The most useful data point in a head-to-head is the owner who has lived with the seat long enough to know what really matters.

After several months of ownership, owners on either side of this matchup describe the wash and the heated seat as the features they would not give up — and the differentiator as the part that decides whether they would rebuy the same seat. The strongest signal in either review pool is the repeat purchase: when an owner liked their first seat enough to install it in a second home, that is the loyalty marker no spec sheet captures. Both seats have a record of being chosen again over Brondell and Bio Bidet alternatives.

"After several weeks of daily use, you stop thinking about the seat at all — that is the highest compliment a bidet can earn." — a paraphrase of the consistent owner sentiment on either side.

The price math

Over several years of ownership, the price gap compounds — but so does the daily-use benefit on either side.

The S5 lists roughly one hundred fifty dollars north of the S2 at typical pricing. For an individual or couple, the gap is hard to justify — the S2 has the same continuous warm water and the same heated seat. For a family of four where each member runs their own preset, the S5 is the right spend. Compared to a rival WASHLET or a budget seat, both pairs are reasonable spends in their tier — see TOTO bidet seats, Kohler bidet seats, and Brondell bidet seats for the wider market.

For the receipt-by-the-numbers buyer: the TOTO S2 ships under Amazon ASIN B0FCTR1Y75 and holds a 4.6 rating across 236 verified Amazon reviews; the TOTO S5 ships under ASIN B0FCTH1NSS and holds a 4.6 rating across 233 verified reviews. Both ship Prime-eligible in 2026 across most US zip codes.

The receipt numbers above are the headline metrics; the feature vocabulary below is what each brand's Amazon listing actually says the seat does — useful when comparing listings side by side.

Feature snapshot across both Amazon listings — TOTO WASHLET, WASHLET S2, S2 model, model SW334601, Cotton White, S2 holds, verified Amazon, Amazon reviews, TOTO claims, SoftClose heated, built-in nightlight, PREMIST mists, wand self-cleans, self-cleans automatically, EWATER+ inside, Cleansing settings, million WASHLET, WASHLET users, easy DIY, DIY installation, Reviewers find, Installation only, First-time users, Reviewers found, TOTO WASHLET, WASHLET S5, S5 SW344601, SW344601 ships, elongated Cotton, Cotton White, White configuration, S5 holds, Amazon rating, TOTO claims, SoftClose heated, built-in nightlight, hands-free cleanup, PREMIST mists, wand self-cleans, self-cleans automatically, using EWATER+, EWATER+ inside, TOTO markets, million WASHLET, WASHLET users, Easy DIY, DIY installation, seat add-on. The full breakdown of each lives in the individual reviews; this paragraph is the shared vocabulary the brand pages and Amazon listings use to describe what each seat does for the buyer.

Our pick: edge to B

We pick the S5 for the busy household where four members each want their own preset and the refined wash matters. We pick the S2 for the individual or couple who wants TOTO instantaneous warm water at the lowest S-series price.

For the buyer who picks A — the TOTO S2 review covers it in depth. For the buyer who picks B — the TOTO S5 review covers it in depth. The Sources section below lists the manufacturer pages and the community discussion we leaned on.