Dreame L40 Ultra AE vs Roborock Saros 20
Technical comparison · Robot vacuums and mops
Roborock Saros 20 holds the category award «Most capable». Dreame L40 Ultra AE and Roborock Saros 20 sit in the same category (robot vacuums and mops). Dreame L40 Ultra AE is ahead on: days between bag changes. Roborock Saros 20 is ahead on: robot height. On the category's technical index, Roborock Saros 20 ranks #1 of 11, Dreame L40 Ultra AE #7.
| Parameter |
L40 Ultra AE
Dreame
F4 · Semi-professional
|
Saros 20
Roborock
F4 · Semi-professional
|
|---|---|---|
| Identity | ||
| Launch year | — | 2026 |
| Use tier | F4 — Semi-professional | F4 — Semi-professional |
| Price | ||
| Price | ~450–1000 € | ~1000–2200 € |
| Price updated on | 09/2026 | 09/2026 |
| Universal specs | ||
| Dimensions (W×D×H) | 35 × 35 × 9.7 cm | — |
| Weight | 4 kg | — |
| Voltage | — | 220 V |
| Category specs | ||
| Cleaning functions | Vacuums, Mops | Vacuums, Mops |
| Availability in Europe | On sale | On sale |
| Suction power | 19000 Pa | 36000 Pa |
| Navigation system | Rotating LiDAR | Solid-state LiDAR |
| Release year | — | 2026 |
| Onboard camera | Yes | Yes |
| Obstacle avoidance | Structured light, Camera with AI recognition | 3D time-of-flight sensor, Camera with AI recognition |
| Onboard microphone | Yes | Yes |
| Where object recognition runs | — | On the device |
| Robot height | 97 mm | 79.8 mm |
| Declared data server region | European Union | European Union |
| Robot diameter | 350 mm | — |
| Maximum threshold height | — | 45 mm |
| Battery capacity | 5200 mAh | 6400 mAh |
| Live video from the app | Yes | Yes |
| Runtime | 180 min | — |
| Charging time | 210 min | 150 min |
| Camera privacy controls | — | Remote video off until enabled, Confirmation on the robot, Password in the app |
| Dustbin capacity | 395 ml | — |
| Two-way audio | Yes | — |
| Microphone can be disabled | — | Yes |
| Mopping system | — | Rotating discs |
| Mop lifting height | 10.5 mm | — |
| Guaranteed years of updates | — | 2 anni |
| Extending mop for edges | Yes | Yes |
| Repairability index (France) | 8.2 /10 | — |
| Dock functions | Automatic emptying, Mop washing, Hot water washing, Mop drying, Warm air drying, Detergent dispenser | Automatic emptying, Mop washing, Hot water washing, Mop drying, Warm air drying, Detergent dispenser |
| Wi-Fi bands | 2.4 GHz | 2.4 GHz, 5 GHz |
| App | Dreamehome | Roborock |
| Mop washing water temperature | 75 °C | 100 °C |
| Dust bag capacity | 3.2 l | — |
| Days between bag changes | 100 giorni | 65 giorni |
| Dock height | 590 mm | — |
| Anti-tangle declared | Yes | Yes |
| Filter type | Washable | Washable |
| Carpet handling | Detects the carpet, Avoids the carpet, Boosts suction, Lifts the mop | Boosts suction, Lifts the mop, Avoids the carpet |
| Matter | — | Built in |
| Built-in voice assistant | — | Commands recognised on board |
| Cliff sensors | Yes | Yes |
The differences that matter
- Days between bag changes: Dreame L40 Ultra AE 100 giorni vs Roborock Saros 20 65 giorni
- Robot height: Dreame L40 Ultra AE 97 mm vs Roborock Saros 20 79.8 mm
- Navigation system: Dreame L40 Ultra AE Rotating LiDAR · Roborock Saros 20 Solid-state LiDAR
- Obstacle avoidance: Dreame L40 Ultra AE Structured light, Camera with AI recognition · Roborock Saros 20 3D time-of-flight sensor, Camera with AI recognition
- Wi-Fi bands: Dreame L40 Ultra AE 2.4 GHz · Roborock Saros 20 2.4 GHz, 5 GHz
In short
Dreame L40 Ultra AE
Measurable advantages: days between bag changes.
Roborock Saros 20
Measurable advantages: robot height. Category award: «Most capable».
This comparison points to the two product pages, where you'll find the complete data and the official links.