# Dreame L40s Ultra AE vs Roborock Qrevo Curv S5X

As of Nov 11, 2026, the Dreame L40s Ultra AE costs $670 and the Roborock Qrevo Curv S5X has no store price on file. The Dreame L40s Ultra AE scores higher in our ranking (7.3 vs 6.7 out of 10). Pick the Dreame L40s Ultra AE for large mixed floor homes on a mid budget. Pick the Roborock Qrevo Curv S5X for tidy homes with carpet and rugs.

Prices checked Nov 11, 2026. HTML version: https://robotsforthat.com/vs/dreame-l40s-ultra-ae-vs-roborock-qrevo-curv-s5x/

## Side by side

| | Dreame L40s Ultra AE | Roborock Qrevo Curv S5X |
|---|---|---|
| Price | $670 | n/a |
| 3 year cost | $670 | n/a |
| Our score | 7.3/10 | 6.7/10 |
| Rank in Floors | #22 | #38 |
| Status | on sale | on sale |
| Warranty | 3 years (Dreame US store) | 1 year limited, valid only for use within the U.S. (Roborock US store) |
| Suction | 19,000 Pa claimed (Dreame) | 18,500 Pa HyperForce (Roborock support); European launch coverage cited 17,000 Pa |
| Navigation | LDS LiDAR (Dreame); Vacuum Wars measured 0.87 m2 per minute against a 0.70 average | Top mounted LiDAR (LDS) |
| Obstacle avoidance | RGB AI camera plus 3D structured light, 120+ obstacle types (Dreame); Vacuum Wars saw it avoid 19 of 24 objects | Reactive Tech structured light, no camera; Vacuum Wars scored 7 of 24 objects avoided, well below average |
| Mopping | Dual spinning mops, 10.5 mm lift, MopExtend (Dreame); Vacuum Wars measured only 0.35 g of water left behind and a 269 combined mop score against a 188 average | Yes, dual spinning pads at up to 200 RPM, 30 water levels, one FlexiArm extending pad, 10 mm lift on carpet |
| Self empty | Yes, 3.2 L dust bag, up to 100 days (Dreame) | Yes, into a disposable bag that Roborock rates for up to 7 weeks per bag (Digital Citizen) |
| Dock features | Auto empty, 167 F (75 C) hot water mop wash, hot air drying, self cleaning washboard, auto detergent and water refill, 4.5 L clean and 4.0 L dirty tanks; water hookup kit sold separately (Dreame) | Multifunctional Dock 3.0 washes pads with 167°F water, warm air drying, auto refill, auto empty, dirty water detection, self cleaning |
| Runtime | Up to 180 min and 1,808 sq ft (Dreame); Vacuum Wars estimated about 2,462 sq ft per charge | 5,200 mAh battery (Digital Citizen); runtime not published |
| Dustbin | 395 ml on the product page, but Dreame's comparison table lists 300 ml or more | 325 mL onboard bin (Vacuum Wars) |
| Height | 97 mm (Dreame dimensions) | 9.79 cm (3.85 in) per Roborock support |
| Pet hair | Liftable rubber brush plus TriCut Brush 3.0 (Dreame); Vacuum Wars measured 81% pet hair pickup and 0% hair wrap with the TriCut brush | DuoDivide anti tangle main brush; Vacuum Wars measured 89% flattened pet hair pickup and 0% hair wrap |
| App | Dreamehome app with Alexa, Google Home, Siri and Apple Watch (Dreame); Matter support (Just A Dad Approved) | Roborock app with zones, no go and no mop areas and suction and water controls |
| Threshold | 20 mm (Dreame) | Up to 2 cm (Digital Citizen); no lifting chassis unlike the original Qrevo Curv |
| Best for | large mixed floor homes on a mid budget | tidy homes with carpet and rugs |
| Skip if | corner cleaning and heavy pet hair matter most | your floors have cables, socks or pet messes |

## What reviewers found

### Dreame L40s Ultra AE

- Vacuum Wars (3.52 Vacuum Wars stars): 85% carpet sand removal, 81% pet hair pickup, 0% hair wrap, 19 of 24 obstacles avoided and about 2,462 sq ft per charge against a 1,015 average. Named Best Value of the Year. [Source](https://vacuumwars.com/dreame-l40s-series-review/)
- Just A Dad Approved (7.9/10): After 90+ days of home testing, liked the AI camera, included TriCut brush and low upkeep, but said corners get less attention without an extending side brush and recommended buying only on deep sale. Its bottom line text names a different model, so treat the score with care. [Source](https://justadadapproved.com/product/dreame-l40s-ultra-ae-robot/)

### Roborock Qrevo Curv S5X

- Vacuum Wars (3.41/5): Measured 93% carpet sand removal, 89% pet hair pickup, 0% hair wrap and about 1,528 sq ft per charge, but avoided only 7 of 24 obstacles and scored a 21 combined mopping score against a 23 average. [Source](https://vacuumwars.com/roborock-qrevo-curv-s5x-review/)
- Digital Citizen (4/5): Strong on hard floors with good corner cleaning and quiet low water mopping at about 55 dB, but it often got stuck on cords and needed two passes on low pile rugs. [Source](https://www.digitalcitizen.life/roborock-qrevo-curv-s5x-review/)

## Questions buyers ask

### Which is better, the Dreame L40s Ultra AE or the Roborock Qrevo Curv S5X?

The Dreame L40s Ultra AE scores higher in our ranking (7.3 vs 6.7 out of 10). Pick the Dreame L40s Ultra AE for large mixed floor homes on a mid budget. Pick the Roborock Qrevo Curv S5X for tidy homes with carpet and rugs.

### What is the difference between the L40s Ultra AE and the Qrevo Curv S5X?

Suction: 19,000 Pa claimed (Dreame) on the L40s Ultra AE, 18,500 Pa HyperForce (Roborock support); European launch coverage cited 17,000 Pa on the Qrevo Curv S5X. Navigation: LDS LiDAR (Dreame); Vacuum Wars measured 0.87 m2 per minute against a 0.70 average on the L40s Ultra AE, Top mounted LiDAR (LDS) on the Qrevo Curv S5X. Obstacle avoidance: RGB AI camera plus 3D structured light, 120+ obstacle types (Dreame); Vacuum Wars saw it… on the L40s Ultra AE, Reactive Tech structured light, no camera; Vacuum Wars scored 7 of 24 objects avoided… on the Qrevo Curv S5X.

Full reviews: [Dreame L40s Ultra AE](https://robotsforthat.com/robot/dreame-l40s-ultra-ae/index.md), [Roborock Qrevo Curv S5X](https://robotsforthat.com/robot/roborock-qrevo-curv-s5x/index.md)