Roborock Saros 20 vs Roborock Saros Z70
Roborock Saros Z70
The short answer
Roborock Saros Z70 comes out ahead overall with 8.2/10 against 8.0/10 for the Roborock Saros 20. Roborock Saros 20 is stronger on cleaning performance, mopping and maintenance. Roborock Saros Z70 is stronger on navigation, obstacle avoidance, features / app, noise and value. At current verified prices, the Roborock Saros Z70 costs about $600.01 less.
- Choose the Roborock Saros 20 if: Pet owners with mixed carpet and hard floors, tall thresholds or low furniture, who want the best all-round, most automated combo and can pay flagship money.
- Choose the Roborock Saros Z70 if: Pet homes where socks, toys and small clutter end up on the floor and you want a Roborock flagship for about $1,000.
Scores by criterion
| Criterion | Roborock Saros 20 | Roborock Saros Z70 |
|---|---|---|
| Cleaning Performance | 8.589% sand, 88% pet hair (Vacuum Wars). | 8.2RTINGS' best for pet hair, but a 7.5 pet-hair subscore and easier tangling |
| Navigation | 7.50.67 m²/min against a 0.70 average, and 1,038 sq ft against 1,170; climbed a 57 mm threshold. | 8.6StarSight 3D and a 3.14-inch body |
| Obstacle Avoidance | 7.3Avoided 17 of 24 objects (Vacuum Wars). | 8.5AI avoidance plus an arm that clears small items |
| Mopping | 8.3Combined score 25.2 against a 20.3 average. | 7.8FlexiArm spinning mops; smaller water tank (Reviewed) |
| Dock / Automation | 8.8Full dock with 212°F washing and drying. | 9.0Auto-empty, hot-water wash and dry |
| Maintenance | 8.20% hair wrap, but the 260 mL bin is small. | 7.0Small bin and brushroll mean more trips and detangling |
| Features / App | 8.5Roborock app. | 9.3Unique robotic arm and a full Roborock app |
| Noise | 6.5Not measured; flat 6.5. | 7.3Typical flagship noise |
| Value | 5.5$1,599.99 from a third-party seller. | 7.5$999.98 for a former flagship |
Specifications
| Spec | Roborock Saros 20 | Roborock Saros Z70 |
|---|---|---|
| Suction | 36,000 Pa | 22,000 Pa |
| Workflow type | Vacuum + mop, all-in-one dock | Self-emptying + hot-water mop wash/dry dock (Multifunctional Dock 4.0) |
| Robot Height | 3.14 in | 3.14 in |
| Auto Empty | Yes | Yes |
| Mop Washing | Yes | Yes |
| Mop Drying | Yes | Yes |
| Navigation Type | Vision-based navigation + Reactive AI obstacle avoidance | StarSight Autonomous System 2.0 (3D sensing) + AI obstacle avoidance |
| Mop Type | Dual rotating pads, liftable | Dual spinning mops on FlexiArm riser |
| Battery Capacity | 6,400 mAh | — |
| Anti-Tangle Brush | Yes | Yes |
| Hot-Water Mop Wash | Yes | Yes |
| Camera Obstacle Avoidance | — | Yes |
Roborock Saros 20
Pros
- Record 57 mm threshold climb in lab testing
- 89% embedded-sand pickup on carpet
- 0% hair wrap
- Above-average mopping score
- Self-emptying, mop-washing and drying dock
Cons
- Avoided 17 of 24 obstacles
- Below-average coverage per charge
- Small 260 mL bin
- Tom's Guide reported leftover litter; premium price from a third-party seller
A specialist. If thick rugs and raised thresholds are your problem, it solves them better than anything else here. For general use, the Dreame or CurvX is the better buy.
Full Roborock Saros 20 review →Roborock Saros Z70
Pros
- RTINGS named it its best for pet hair among models it tested
- OmniGrip arm moves socks and small items
- Slim 3.14-inch body
- Hot-water mop washing and drying
- Much cheaper than the Saros 20
Cons
- The arm bay forced a smaller bin and brushroll, so more dock trips
- Long hair can tangle on the brushroll
- Reviewed says the arm sometimes fumbles objects and slows cleaning
- Smaller water tank
The Z70 is the pick for pet homes with clutter. It is a capable, well-priced Roborock, but long-haired shedders will do better with the Saros 20 or the Dreame L60 Ultra PE.
Full Roborock Saros Z70 review →Both products are part of our guide The Best Robot Vacuum & Mop Combos for Pet Hair of 2026, where you can see every pick, how we score and current prices from each retailer.