Between the Saros Z70 and Roomba j9+, the Saros Z70 comes out ahead in noise and mopping, while the Roomba j9+ wins on battery life. Overall, the Saros Z70 scores 85.1 and the Roomba j9+ scores 49.8 on our Mars Score.
Which should you buy?
The Saros Z70 is the clear pick on raw spec strength, leading by 35.3 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the Saros Z70 if you care most about noise and mopping. The biggest gaps in its favor are noise, mopping, lidar, among others.
Pick the Roomba j9+ if you care most about battery life. Its strongest claims are battery life.
Both ship with comparable self-empty base, ai obstacle avoidance, so those specs don't separate the two — focus on the differences below.
Bottom line: the Saros Z70 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Roborock - Saros Z70 wins
- ▲Noise — 3.00 dB less. 65 vs 68.
- ▲Has Mopping.
- ▲Has Lidar.
- ▲Suction: 22000 Pa vs 0 Pa.
- ▲Water tank: 270 ml vs 0 ml.
Why iRobot - Roomba j9+ wins
- ▲Battery life — 11.11% more. 200 min vs 180 min.
Spec comparison
Cleaning
| Spec | Roborock - Saros Z70 | iRobot - Roomba j9+ |
|---|---|---|
| Suction | 22000 Palead | 0 Pa |
| Mopping | truelead | false |
| Water tank | 270 mllead | 0 ml |
| Dustbin | 300 ml | 500 mllead |
| Carpet detection | true | true |
Navigation
| Spec | Roborock - Saros Z70 | iRobot - Roomba j9+ |
|---|---|---|
| Lidar | truelead | false |
| Camera navigation | true | true |
| AI obstacle avoidance | true | true |
| Max climb | 40 mmlead | 20 mm |
Autonomy
| Spec | Roborock - Saros Z70 | iRobot - Roomba j9+ |
|---|---|---|
| Battery life | 180 min | 200 minlead |
| Self-empty base | true | true |
| Self-wash mop | truelead | false |
| Self-dry mop | truelead | false |
| Noise | 65 dBlead | 68 dB |
Frequently asked
Which has stronger suction, Saros Z70 or Roomba j9+?+
Saros Z70 delivers 22000 Pa vs 0 Pa.
Do Saros Z70 or Roomba j9+ mop?+
Saros Z70 mops; Roomba j9+ vacuums only.
Which has a self-emptying base, Saros Z70 or Roomba j9+?+
Both ship with a self-emptying base.
Spec-level deep dives
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