Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | iRobot - Roomba j9+ | Wyze - Robot Vacuum Pro |
|---|---|---|
| Battery life | 200 min | 120 min |
| Noise | 68 dB | 65 dB |
| AI obstacle avoidance | true | false |
| Mopping | false | true |
| Lidar | false | true |
| Suction | 0 Pa | 3000 Pa |
Between the Roomba j9+ and Robot Vacuum Pro, the Roomba j9+ comes out ahead in battery life / ai obstacle avoidance, while the Robot Vacuum Pro wins on noise / mopping. Overall, the Roomba j9+ scores 45.9 and the Robot Vacuum Pro scores 74.1 on our Mars Score.
Which should you buy?
The Robot Vacuum Pro is the clear pick on raw spec strength, leading by 28.2 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 Roomba j9+ if you care most about battery life / ai obstacle avoidance. The biggest gaps in its favor are battery life, ai obstacle avoidance. The single most decisive one: Battery life — 66.67% more. 200 min vs 120 min.
Pick the Robot Vacuum Pro if you care most about noise / mopping. Its strongest claims are noise, mopping, lidar, among others. The single most decisive one: Noise — 3.00 dB less. 65 vs 68.
Both ship with comparable self-empty base, so those specs do not separate the two — focus on the differences below.
Bottom line: the Robot Vacuum Pro is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: iRobot - Roomba j9+ or Wyze - Robot Vacuum Pro?
Wyze - Robot Vacuum Pro leads the current Mars Score by 28.2 points.The more useful decision is the trade-off behind that result: compare suction, battery life, mopping against the way you will actually use the product.
Choose iRobot - Roomba j9+ if…
iRobot - Roomba j9+ has the measurable edge on battery life min, has ai obstacle avoidance.
Choose Wyze - Robot Vacuum Pro if…
Wyze - Robot Vacuum Pro has the measurable edge on noise db, has mopping, has lidar.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why iRobot - Roomba j9+ wins
- ▲Battery life — 66.67% more. 200 min vs 120 min.
- ▲Has AI obstacle avoidance.
Why Wyze - Robot Vacuum Pro wins
- ▲Noise — 3.00 dB less. 65 vs 68.
- ▲Has Mopping.
- ▲Has Lidar.
- ▲Suction: 3000 Pa vs 0 Pa.
- ▲Water tank: 180 ml vs 0 ml.
Spec comparison
Cleaning
| Spec | iRobot - Roomba j9+ | Wyze - Robot Vacuum Pro |
|---|---|---|
| Suction | 0 Pa | 3000 Palead |
| Mopping | false | truelead |
| Water tank | 0 ml | 180 mllead |
| Dustbin | 500 mllead | 350 ml |
| Carpet detection | true | true |
Navigation
| Spec | iRobot - Roomba j9+ | Wyze - Robot Vacuum Pro |
|---|---|---|
| Lidar | false | truelead |
| Camera navigation | true | true |
| AI obstacle avoidance | truelead | false |
| Max climb | 20 mmlead | 18 mm |
Autonomy
| Spec | iRobot - Roomba j9+ | Wyze - Robot Vacuum Pro |
|---|---|---|
| Battery life | 200 minlead | 120 min |
| Self-empty base | true | true |
| Self-wash mop | false | false |
| Self-dry mop | false | false |
| Noise | 68 dB | 65 dBlead |
Frequently asked
Which has stronger suction, Roomba j9+ or Robot Vacuum Pro?+
Robot Vacuum Pro delivers 3000 Pa vs 0 Pa.
Do Roomba j9+ or Robot Vacuum Pro mop?+
Robot Vacuum Pro mops; Roomba j9+ vacuums only.
Which has a self-emptying base, Roomba j9+ or Robot Vacuum Pro?+
Both ship with a self-emptying base.