Ecovacs Deebot T90S Omni vs Roborock Saros 20 Sonic: Which to Buy

The Ecovacs Deebot T90S Omni and the Roborock Saros 20 Sonic are evenly matched, rated 4.2 and 4.2. The Ecovacs Deebot T90S Omni leads on mopping.

Higher rated

Ecovacs Deebot T90S Omni

#34 in Self-cleaning dock4.2Full review

A slightly cheaper T90S roller-mop robot for mixed-floor homes; check the price gap to the T90S Pro Omni before buying.

Amazon $799.99

$799.99

Roborock Saros 20 Sonic

#44 in Self-cleaning dock4.2Full review

For homes that want the Saros 20’s slim build and threshold climbing with a retractable LiDAR and a sonic mop.

Amazon

Prices were last checked October 26, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.

Which should you buy?

Choose the Ecovacs Deebot T90S Omni for mopping (Roller, lifts 15 mm, extends to edges vs Vibrating pad, leaves its mop at the dock for carpet).

Scores side by side

Each factor is scored 0-100 against the same fixed reference points for every self-cleaning dock robot vacuum; a clear win is highlighted. How we rank explains each one.

Factor weight	Ecovacs Deebot T90S Omni	Roborock Saros 20 Sonic
Overall rating	4.2/5	4.2/5
Cleaning 30%	71 not yet tested; estimated from 10 tested Ecovacs robots and the median of the 70 tested robots	82 measured 92% of sand from carpet, 77.8% of pet hair, no hair tangled
Value 25%	50 $800	50 no current price (neutral score used)
Dock 20%	100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent	100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent, optional water hookup
Navigation 15%	100 LiDAR + camera	100 LiDAR + camera
Mopping 10%	95 Roller, lifts 15 mm, extends to edges	46 Vibrating pad, leaves its mop at the dock for carpet

Independent tests