Dreame L40s Ultra CE
A cheaper L40s with a full self-cleaning dock, for homes that want hands-off mopping on a budget and can live without hot-water washing.
Amazon $399.49$399.49
The Dreame L40s Ultra CE is the better robot vacuum overall, rated 4.4 to 3.7. The Dreame L40s Ultra CE leads on navigation and mopping. The Eufy Omni C20 costs $19.50 less ($379.99 vs $399.49).
Eufy Omni C20
The cheapest way into a dock that washes the mops, for small homes with low furniture. Its weak carpet cleaning and short range rule it out for bigger or carpeted homes.
Amazon $379.99$379.99
Prices were last checked October 27, 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 CE for navigation (LiDAR + 3D light vs LiDAR) and mopping (Dual spinning pads, lifts 10.5 mm, extends to edges vs Dual spinning pads, lifts 10.4 mm).
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 CE | Eufy Omni C20 |
|---|---|---|
| Overall rating | 4.4/5 | 3.7/5 |
| Cleaning 30% | 73 not yet tested; estimated from 12 tested Dreame robots and the median of the 70 tested robots | 36 measured 75% of sand from carpet, 96% of pet hair, some hair tangled (0.5) |
| Value 25% | 92 $399 | 95 $380 |
| Dock 20% | 83 Self-empties the bin, washes the mop, hot-air mop drying | 68 Self-empties the bin, washes the mop |
| Navigation 15% | 85 LiDAR + 3D light | 65 LiDAR |
| Mopping 10% | 76 Dual spinning pads, lifts 10.5 mm, extends to edges | 61 Dual spinning pads, lifts 10.4 mm |
Independent tests
Dreame L40s Ultra CE
No independent test published yet.
Eufy Omni C20
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 75% | 96% | 0.5 | 546 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). |
Specifications
| Dreame L40s Ultra CE | Eufy Omni C20 | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 13,000 Pa | 7,000 Pa |
| Main brush | TriCut brush | Rolling brush with Pro-Detangle Comb |
| Dustbin | 320 mL | 250 mL |
| Extending side brush | No | No |
| Mopping | ||
| Mop | Dual spinning pads, lifts 10.5 mm, extends to edges | Dual spinning pads, lifts 10.4 mm |
| Mop lift | 10.5 mm | 10.4 mm |
| Leaves mop at dock | No | No |
| Extending mop | Yes | No |
| Dock | ||
| Dock | Washes mop + empties | Washes mop + empties |
| Self-empties | Yes | Yes |
| Dust bag | 3.2 L | 3.1 L |
| Washes mop | Yes | Yes |
| Hot-water wash | No | No |
| Hot-air drying | Yes | No |
| Detergent dosing | No | - |
| Water hookup option | - | No |
| Clean water tank | 4.5 L | 2.5 L |
| Navigation & app | ||
| Navigation | LiDAR + 3D light | LiDAR |
| Obstacle avoidance | Single-laser 3D structured light | Infrared and point laser for larger obstacles only |
| Climbs thresholds | 20 mm | 18 mm |
| Matter | - | No |
| Voice assistants | Alexa, Siri, Google Assistant | Alexa, Google Assistant |
| Build | ||
| Height | 4.1 in (104 mm) | 3.3 in (85 mm) |
| Retracting LiDAR | No | No |
| Battery | 5,200 mAh | 3,200 mAh |
| Run time | Up to 4 h 20 min | Up to 1 h 41 min |
| Weight | 8.6 lb (3.9 kg) | 7.3 lb (3.3 kg) |
| Warranty | 3 years | 1 year |
| Released | 2025-08 | 2024-11 |