Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Dreame - X40 Ultra | iRobot - Roomba i7+ |
|---|---|---|
| Battery life | 210 min | 75 min |
| Noise | 65 dB | 68 dB |
| Mopping | true | false |
| Lidar | true | false |
| AI obstacle avoidance | true | false |
| Suction | 12000 Pa |
Between the X40 Ultra and Roomba i7+, the X40 Ultra comes out ahead in battery life / noise, while the Roomba i7+ wins on several specs. Overall, the X40 Ultra scores 83.9 and the Roomba i7+ scores 36.6 on our Mars Score.
Which should you buy?
The X40 Ultra is the clear pick on raw spec strength, leading by 47.3 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 X40 Ultra if you care most about battery life / noise. The biggest gaps in its favor are battery life, noise, mopping, among others. The single most decisive one: Battery life — 180.00% more. 210 min vs 75 min.
The Roomba i7+ similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable self-empty base, so those specs do not separate the two — focus on the differences below.
Bottom line: the X40 Ultra 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: Dreame - X40 Ultra or iRobot - Roomba i7+?
Dreame - X40 Ultra leads the current Mars Score by 47.3 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 Dreame - X40 Ultra if…
Dreame - X40 Ultra has the measurable edge on battery life min, noise db, has mopping.
Choose iRobot - Roomba i7+ if…
iRobot - Roomba i7+ does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
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 Dreame - X40 Ultra wins
- ▲Battery life — 180.00% more. 210 min vs 75 min.
- ▲Noise — 3.00 dB less. 65 vs 68.
- ▲Has Mopping.
- ▲Has Lidar.
- ▲Has AI obstacle avoidance.
- ▲Suction: 12000 Pa vs Pa.
- ▲Water tank: 270 ml vs 0 ml.
Why iRobot - Roomba i7+ wins
- No decisive advantages.
Spec comparison
Cleaning
| Spec | Dreame - X40 Ultra | iRobot - Roomba i7+ |
|---|---|---|
| Suction | 12000 Palead | |
| Mopping | truelead | false |
| Water tank | 270 mllead | 0 ml |
| Dustbin | 350 ml | 400 mllead |
| Carpet detection | true | true |
Navigation
| Spec | Dreame - X40 Ultra | iRobot - Roomba i7+ |
|---|---|---|
| Lidar | truelead | false |
| Camera navigation | true | true |
| AI obstacle avoidance | truelead | false |
| Max climb | 60 mmlead | 20 mm |
Autonomy
| Spec | Dreame - X40 Ultra | iRobot - Roomba i7+ |
|---|---|---|
| Battery life | 210 minlead | 75 min |
| 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, X40 Ultra or Roomba i7+?+
X40 Ultra delivers 12000 Pa vs Pa.
Do X40 Ultra or Roomba i7+ mop?+
X40 Ultra mops; Roomba i7+ vacuums only.
Which has a self-emptying base, X40 Ultra or Roomba i7+?+
Both ship with a self-emptying base.