Dreame L40s Ultra AE
For buyers who want an AI camera for obstacle avoidance and remote viewing on a full self-cleaning dock; for carpet and pet hair, the plain L40s Ultra measured better.
Amazon $599.98$599.98
The Dreame L40s Ultra AE is the better robot vacuum overall, rated 4.3 to 3.9. The Dreame L40s Ultra AE leads on navigation.
iRobot Roomba Plus 415 Combo
A low-profile entry to iRobot’s self-washing mop docks for hard-floor homes; the Plus 515 adds hot-water washing for a little more.
Amazon $599$599
Prices were last checked October 26, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Dreame L40s Ultra AE for navigation (LiDAR + camera vs LiDAR).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every self-cleaning dock robot vacuum; a clear win is highlighted. How we rank explains each one.
| Factor weight | Dreame L40s Ultra AE | iRobot Roomba Plus 415 Combo |
|---|---|---|
| Overall rating | 4.3/5 | 3.9/5 |
| Cleaning 30% | 66 measured 85% of sand from carpet, 80.8% of pet hair, no hair tangled | 48 not yet tested; estimated from 3 tested iRobot robots and the median of the 70 tested robots |
| Value 25% | 67 $600 | 67 $599 |
| Dock 20% | 100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent | 100 Self-empties the bin, washes the mop, hot-air mop drying |
| Navigation 15% | 100 LiDAR + camera | 65 LiDAR |
| Mopping 10% | 76 Dual spinning pads, lifts 10.5 mm, extends to edges | 76 Dual spinning pads, lifts 10 mm, extends to edges |
Independent tests
Dreame L40s Ultra AE
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 85% | 80.8% | 0 | 1,591 sq ft | Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet, two runs; 7 in hair tangle on hard floor (0 = none wrapped). |
iRobot Roomba Plus 415 Combo
No independent test published yet.
Specifications
| Dreame L40s Ultra AE | iRobot Roomba Plus 415 Combo | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 19,000 Pa | - |
| Main brush | Liftable rubber brush with TriCut hair-cutting | tangle-free rubber brushes |
| Dustbin | 395 mL | - |
| Extending side brush | No | Yes |
| Mopping | ||
| Mop | Dual spinning pads, lifts 10.5 mm, extends to edges | Dual spinning pads, lifts 10 mm, extends to edges |
| Mop lift | 10.5 mm | 10 mm |
| Leaves mop at dock | No | No |
| Extending mop | Yes | Yes |
| Dock | ||
| Dock | Washes mop + empties | Washes mop + empties |
| Self-empties | Yes | Yes |
| Dust bag | 3.2 L | - |
| Washes mop | Yes | Yes |
| Hot-water wash | Yes | - |
| Hot-air drying | Yes | Yes |
| Detergent dosing | Yes | - |
| Clean water tank | 4.5 L | - |
| Navigation & app | ||
| Navigation | LiDAR + camera | LiDAR |
| Obstacle avoidance | AI camera, recognises 120+ object types | Object sensing (sensor type not given) |
| Climbs thresholds | 20 mm | - |
| Voice assistants | Alexa, Google Assistant | - |
| Build | ||
| Height | 3.8 in (97 mm) | 3.3 in (84 mm) |
| Battery | 5,200 mAh | 5,200 mAh |
| Run time | Up to 3 h | - |
| Weight | 8.8 lb (4 kg) | 6.4 lb (2.9 kg) |
| Warranty | 3 years | - |
| Released | 2025-08 | 2026-07 |