Roborock Saros 20 Flow
For homes with lots of hard floor that want a roller mop with flagship suction and threshold climbing.
Amazon $1,699.99$1,699.99
The Roborock Saros 20 Flow and the Eufy Omni S2 are evenly matched, rated 3.8 and 3.8. The Roborock Saros 20 Flow leads on navigation. The Eufy Omni S2 wins on dock. The Eufy Omni S2 costs $100 less ($1,599.99 vs $1,699.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Eufy Omni S2
For buyers who want a low-slung flagship that mops with a hot-washed roller and handles tall thresholds. Cheaper robots match its carpet cleaning and run longer per charge.
Amazon $1,599.99$1,599.99
Which should you buy?
- Choose the Roborock Saros 20 Flow for navigation (LiDAR + camera vs Camera + 3D light).
- Choose the Eufy Omni S2 for dock (Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent, optional water hookup vs Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent).
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 | Roborock Saros 20 Flow | Eufy Omni S2 |
|---|---|---|
| Overall rating | 3.8/5 | 3.8/5 |
| Cleaning 30% | 74 measured 89% of sand from carpet, 76.2% of pet hair, no hair tangled | 75 measured 87% of sand from carpet, 88.5% of pet hair, no hair tangled |
| Value 25% | 3 $1,700 | 7 $1,600 |
| Dock 20% | 90 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 | 80 Camera + 3D light |
| Mopping 10% | 95 Roller, lifts 15 mm, extends to edges | 90 Roller, lifts 10.5 mm, extends to edges |
Independent tests
Roborock Saros 20 Flow
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 89% | 76.2% | 0 | 1,421 sq ft | Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet, two runs; 7 in hair tangle on hard floor (0 = none wrapped). |
Eufy Omni S2
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 87% | 88.5% | 0 | 1,088 sq ft | Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet, two runs; 7 in hair tangle on hard floor (0 = none wrapped). |
Specifications
| Roborock Saros 20 Flow | Eufy Omni S2 | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 36,000 Pa | 30,000 Pa |
| Main brush | dual anti-tangle brush system | DuoSpiral anti-tangle brushes |
| Dustbin | 245 mL | 300 mL |
| Extending side brush | No | Yes |
| Mopping | ||
| Mop | Roller, lifts 15 mm, extends to edges | Roller, lifts 10.5 mm, extends to edges |
| Mop lift | 15 mm | 10.5 mm |
| Leaves mop at dock | No | No |
| Extending mop | Yes | Yes |
| Water tank | 67 mL | 120 mL |
| Dock | ||
| Dock | Washes mop + empties | Washes mop + empties |
| Self-empties | Yes | Yes |
| Dust bag | - | 2.5 L |
| Washes mop | Yes | Yes |
| Hot-water wash | Yes | Yes |
| Hot-air drying | Yes | Yes |
| Detergent dosing | Yes | Yes |
| Water hookup option | No | Yes |
| Clean water tank | - | 3 L |
| Navigation & app | ||
| Navigation | LiDAR + camera | Camera + 3D light |
| Obstacle avoidance | Reactive AI with RGB recognition, 300+ object types | RGB camera + LED + 3D TOF, recognises 200+ obstacle types and objects over 1 cm |
| Climbs thresholds | 88 mm | 42 mm |
| Matter | Yes | Yes |
| Voice assistants | - | Alexa, Google Assistant, Siri |
| Build | ||
| Height | 3.5 in (89.8 mm) | 3.9 in (98 mm) |
| Retracting LiDAR | Yes | No |
| Battery | 6,400 mAh | 4,600 mAh |
| Run time | Up to 5 h 1 min | Up to 4 h 20 min |
| Weight | 11.5 lb (5.2 kg) | 11.5 lb (5.2 kg) |
| Warranty | 1 year | 1 year |
| Released | 2026-09 | 2026-01 |