Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Ecovacs - Deebot T30 Omni | iRobot - Roomba j9+ |
|---|---|---|
| Battery life | 180 min | 200 min |
| Noise | 63 dB | 68 dB |
| Mopping | true | false |
| Lidar | true | false |
| Suction | 11000 Pa | 0 Pa |
| Water tank | 210 ml | 0 ml |
Between the Deebot T30 Omni and Roomba j9+, the Deebot T30 Omni comes out ahead in noise / mopping, while the Roomba j9+ wins on battery life. Overall, the Deebot T30 Omni scores 81.9 and the Roomba j9+ scores 45.9 on our Mars Score.
Which should you buy?
The Deebot T30 Omni is the clear pick on raw spec strength, leading by 36.0 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 Deebot T30 Omni if you care most about noise / mopping. The biggest gaps in its favor are noise, mopping, lidar, among others. The single most decisive one: Noise — 5.00 dB less. 63 vs 68.
Pick the Roomba j9+ if you care most about battery life. Its strongest claims are battery life. The single most decisive one: Battery life — 11.11% more. 200 min vs 180 min.
Both ship with comparable self-empty base, ai obstacle avoidance, so those specs do not separate the two — focus on the differences below.
Bottom line: the Deebot T30 Omni 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: Ecovacs - Deebot T30 Omni or iRobot - Roomba j9+?
Ecovacs - Deebot T30 Omni leads the current Mars Score by 36.0 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 Ecovacs - Deebot T30 Omni if…
Ecovacs - Deebot T30 Omni has the measurable edge on noise db, has mopping, has lidar.
Choose iRobot - Roomba j9+ if…
iRobot - Roomba j9+ has the measurable edge on battery life min.
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 Ecovacs - Deebot T30 Omni wins
- ▲Noise — 5.00 dB less. 63 vs 68.
- ▲Has Mopping.
- ▲Has Lidar.
- ▲Suction: 11000 Pa vs 0 Pa.
- ▲Water tank: 210 ml vs 0 ml.
Why iRobot - Roomba j9+ wins
- ▲Battery life — 11.11% more. 200 min vs 180 min.
Spec comparison
Cleaning
| Spec | Ecovacs - Deebot T30 Omni | iRobot - Roomba j9+ |
|---|---|---|
| Suction | 11000 Palead | 0 Pa |
| Mopping | truelead | false |
| Water tank | 210 mllead | 0 ml |
| Dustbin | 420 ml | 500 mllead |
| Carpet detection | true | true |
Navigation
| Spec | Ecovacs - Deebot T30 Omni | iRobot - Roomba j9+ |
|---|---|---|
| Lidar | truelead | false |
| Camera navigation | true | true |
| AI obstacle avoidance | true | true |
| Max climb | 22 mmlead | 20 mm |
Autonomy
| Spec | Ecovacs - Deebot T30 Omni | 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 | 63 dBlead | 68 dB |
Frequently asked
Which has stronger suction, Deebot T30 Omni or Roomba j9+?+
Deebot T30 Omni delivers 11000 Pa vs 0 Pa.
Do Deebot T30 Omni or Roomba j9+ mop?+
Deebot T30 Omni mops; Roomba j9+ vacuums only.
Which has a self-emptying base, Deebot T30 Omni or Roomba j9+?+
Both ship with a self-emptying base.