Detailed Bidet Toilet Seat Comparison: TOTO S550e WASHLET VS. Bio Bidet dib-850

NOTE: Both of these bidets have been discontinued. If you’re in search of the perfect replacement, tailored specifically to your needs and preferences, we’re here to assist! Contact us to discover your ideal bathroom solution with personalized guidance from our dedicated experts.

View These Seats

dib-850 Special Edition Bidet Seat

TOTO S550e WASHLET – Classic Trim – Elongated

TOTO S550e WASHLET – Contemporary Trim – Elongated

TOTO S550e

Classic Trim

TOTO S550e

Contemporary Trim 

Bio Bidet dib-850





Bio Bidet dib-850

Weight Limit

Supports up to 320 lbs.

Supports up to 400 lbs.


 1 year full warranty, No upgrade options 

 3 year full warranty, Can upgrade to 6 full years 


 Single nozzle, Not easily replaceable 

 Single 3 in 1 nozzle, easy to replace 

Water Flow

0.1 gallons per minute

0.16 gallons per minute

Nozzle Material


Stainless Steel

Enema Wash



Sittable Lid


Yes (up to 200 lbs)

One Button Wash & Dry



Auto Open & Close Lid


No auto open

Color Option

White or Beige


Nozzle Sterilization

Yes (with EWATER+)


Detailed comparison of the TOTO S550e WASHLET and Bio Bidet dib-850 seats

Both the TOTO S550e and the Bio Bidet dib-850 offer top of line features for comfort and design and would be a great addition to any bathroom. Below we walk through the differences in these units so you can make the best purchase for your preferences and situation.

Look and Feel

Style Options

If you are looking for design options, The TOTO S550e is available in two different trim options, classic and contemporary, as well as two color options to match your style preferences. The Bio Bidet dib-850 is only offered in one trim and color option, but offers a sleek, modern look as well as a seat that is contoured for ultimate comfort.


While both the TOTO S550e and the Bio Bidet dib-850 offer great features like an adjustable heated seat, warm air dryer, LED night light, wireless remote, and built-in deodorizer, there are some design differences between the two.


If a sittable lid is an important feature to you, the dib-850 will be your best option in this situation, as the S550e does not offer that feature. 

Auto Open and Close Lid

The TOTO S550e also features an automatic opening and closing lid, while the Bio Bidet dib-850 only can auto close. Depending on your preference, these features can also be turned off and the lid can be opened and closed manually.



The S550e offers a single nozzle system made of plastic that is unfortunately not easy to replace, while the dib-850 features a single 3-in-1 stainless steel nozzle that is easily replaceable when necessary. It’s also worth noting that the TOTO S550e nozzle system offers on demand sterilization with EWATER+ (electrolyzed water) while the the Bio Bidet dib-850 does not.

Enema Wash

The TOTO S550e and Bio Bidet dib-850 each have features that provide a great, comfortable wash, but if constipation is something you struggle with and you are looking for an enema wash feature, the dib-850 is the seat for you.

One Button Wash & Dry

The Bio Bidet dib-850 offers the convenience of a one button wash and dry feature, while the S550e does not.

Other Differences


The Bio Bidet db-850 offers a 3 year full warranty that can be extended to 6 years if you are looking for extra coverage, while the TOTO S550e only offers non-upgradable 1 year full warranty.

Final Thoughts

Both of these seats would be great addition to any home, but determining which is best for you comes down to your individual needs and preferences.

If an enema wash or a sittable lid are must have features, then the Bio Bidet dib-850 will be your best option. On the other hand, if an automatically closing and opening lid and nozzle sterilization is important to you, you will want to consider the TOTO S550e. Either way, you will be getting a modern, and top of the line quality seat for your specific needs.

Additional Details

Model Numbers (SKUs)

TOTO S550e Standard SKUs:

TOTO s550e – Classic Trim – Cotton White: SW3054#01

TOTO s550e – Classic Trim – Sedona Beige: SW3054#12

TOTO s550e – Modern or Contemporary Trim – Cotton White: SW3056#01

TOTO s550e – Modern or  Contemporary Trim – Sedona Beige: SW3056#12


TOTO s550e (WASHLET+) – Classic Trim – Cotton White: SW3054T40#01

TOTO s550e (WASHLET+) – Classic Trim – Sedona Beige: SW3054T40#12

TOTO s550e (WASHLET+) – Modern or  Contemporary Trim – Cotton White: SW3056T40#01

TOTO s550e (WASHLET+) – Modern or  Contemporary Trim – Sedona Beige: SW3056T40#12

*NOTE: WASHLET+ refers to a version of the seat that allows the hoses and cords to be hidden

View These Seats

dib-850 Special Edition Bidet Seat

TOTO S550e WASHLET – Classic Trim – Elongated

TOTO S550e WASHLET – Contemporary Trim – Elongated

Back to Comparison Listings

Bio Bidet DIB-850 Special Edition Bidet Seat Comparison Listings

TOTO S550e WASHLET Bidet Seat Comparison Listings

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