Roborock Saros 20 Flow vs Eufy Omni S2: which should you buy?
Two flagships at the top of the robot-vac market, both promising to handle the whole job and leave you out of it. The Roborock Saros 20 Flow and Eufy Omni S2 are pitched at the same buyer, so the real question is which one earns that spend today. Here is the live side-by-side on suction, battery, mopping and the Dust Rocket Autonomy Score.
Quick verdict
At today's prices, the Roborock Saros 20 Flow is the better value on price: it is 4% below its usual price, while the Eufy Omni S2 is 15% above its usual price. If the Eufy Omni S2 drops back to its usual ~$1,995, it becomes the better value on price.
Roborock Saros 20 Flow leads on stronger suction for carpet and pet hair, longer runtime for larger homes, clearing higher thresholds and thick rugs, a higher hands-off Autonomy Score.
Specifications, side by side
| Specification | Roborock Saros 20 Flow | Eufy Omni S2 |
|---|---|---|
| Lowest price | $2,299 | $2,299 |
| Value vs its usual price | 4% below its usual price | 15% above its usual price |
| Suction | 36,000 Pa | 30,000 Pa |
| Battery runtime | 301 min | 180 min |
| Navigation | LiDAR | LiDAR |
| Obstacle avoidance | AI camera | AI camera |
| Mop system | Roller | Rotating roller |
| Self-emptying base | Yes | - |
| Auto mop washing | Yes | Yes |
| Anti-tangle brush (pet hair) | - | Yes |
| HEPA filter (allergens) | - | Yes |
| Max threshold (climb) | 45 mm | 35 mm |
| Dustbin capacity | - | 0.33 L |
| Smart home | - | Alexa, Google Assistant, Apple Home |
| Noise level | - | - |
| Warranty | 2 years | 2 years |
| Dust Rocket Autonomy Score | 9 / 10 | 7 / 10 |
| How the Dust Rocket Autonomy Score is calculated → | ||
The two use different mop designs rather than one being clearly better or worse - check the mop row above for each machine's type.
Value on price compares each machine's current price with its own 90-day typical price, so it reflects how good a deal it is right now rather than which is the better product for you. These figures come from the specifications and prices we track on our own product pages, not independent lab tests, and update live.