# Dreame L40s Ultra AE vs Dreame L50 Ultra

As of Oct 31, 2026, the Dreame L40s Ultra AE costs $670 and the Dreame L50 Ultra costs $900, so the Dreame L40s Ultra AE is $230 cheaper. The Dreame L40s Ultra AE scores higher in our ranking (7.2 vs 6.4 out of 10). Pick the Dreame L40s Ultra AE for large mixed floor homes on a mid budget. Pick the Dreame L50 Ultra for mixed floors with tall thresholds.

Prices checked Oct 31, 2026. HTML version: https://robotsforthat.com/vs/dreame-l40s-ultra-ae-vs-dreame-l50-ultra/

## Side by side

| | Dreame L40s Ultra AE | Dreame L50 Ultra |
|---|---|---|
| Price | $670 | $900 |
| 3 year cost | $670 | $1,194 |
| Our score | 7.2/10 | 6.4/10 |
| Rank in Floors | #16 | #28 |
| Status | on sale | on sale |
| Warranty | 3 years (Dreame US store) | 3 years per the Dreame US product page (terms may vary by region) |
| Suction | 19,000 Pa claimed (Dreame) | 19,500 Pa Vormax (brand claim); Vacuum Wars did not publish airflow for this model |
| Navigation | LDS LiDAR (Dreame); Vacuum Wars measured 0.87 m2 per minute against a 0.70 average | LiDAR laser navigation |
| Obstacle avoidance | RGB AI camera plus 3D structured light, 120+ obstacle types (Dreame); Vacuum Wars saw it avoid 19 of 24 objects | RGB camera plus 3D structured light with LED lights, 180+ object types (brand claim); Vacuum Wars scored 20 of 24 objects avoided |
| 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 with one extending pad, 10.5 mm lift on carpet and automatic pad removal |
| Self empty | Yes, 3.2 L dust bag, up to 100 days (Dreame) | Yes, into a 3.2 L disposable bag that Dreame says lasts up to 100 days |
| 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) | Washes pads with water up to 167°F (4 settings), hot air drying, auto refill, auto detergent dosing, self cleaning washboard with 20 nozzles |
| Runtime | Up to 180 min and 1,808 sq ft (Dreame); Vacuum Wars estimated about 2,462 sq ft per charge | 6,400 mAh battery; up to 200 min in quiet mode (brand claim) |
| Dustbin | 395 ml on the product page, but Dreame's comparison table lists 300 ml or more | 395 mL onboard bin per Dreame (Vacuum Wars lists 400 mL) |
| Height | 97 mm (Dreame dimensions) | 97 mm (3.8 in) robot height per Dreame |
| 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 | HyperStream detangling DuoBrush; Vacuum Wars measured 100% flattened pet hair pickup |
| App | Dreamehome app with Alexa, Google Home, Siri and Apple Watch (Dreame); Matter support (Just A Dad Approved) | Dreamehome app; works with Alexa, Siri and Google Home, Matter promised in a future update |
| Threshold | 20 mm (Dreame) | 1.65 in single step and 2.36 in double step (brand claim); Vacuum Wars measured 42 mm single, tied for the highest it tested |
| Best for | large mixed floor homes on a mid budget | mixed floors with tall thresholds |
| Skip if | corner cleaning and heavy pet hair matter most | you have a large home and want one charge to cover it |

## 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/)

### Dreame L50 Ultra

- Vacuum Wars (3.84/5): Measured 90% carpet sand removal, 100% pet hair pickup, 20 of 24 obstacles avoided, a 211 point mopping score versus a 188 average with 0.35 g of water left, and a 42 mm threshold climb; coverage was below average at about 823 sq ft per charge. [Source](https://vacuumwars.com/dreame-l50-ultra-robot-vacuum-review)
- Vacuum Wars (3 month test): After three months of daily use with kids and a heavy shedding dog, mapping and obstacle avoidance held up, but hair formed clumps, the dock and bin clogged about once a week, and the app did not warn of clogs. [Source](https://vacuumwars.com/dreame-l50-ultra-review-3-months)
- RTINGS: In RTINGS' comparison with the L40 Ultra, the L50 Ultra handled pet hair better and had stronger obstacle avoidance and threshold clearance, while the L40 Ultra cleaned hard floors and carpet better. We could not read RTINGS' numeric scores. [Source](https://www.rtings.com/robot-vacuum/tools/compare/dreame-l40-ultra-dreame-l50-ultra/74370/103657)

## Questions buyers ask

### Which is better, the Dreame L40s Ultra AE or the Dreame L50 Ultra?

The Dreame L40s Ultra AE scores higher in our ranking (7.2 vs 6.4 out of 10). Pick the Dreame L40s Ultra AE for large mixed floor homes on a mid budget. Pick the Dreame L50 Ultra for mixed floors with tall thresholds.

### Which is cheaper?

The Dreame L40s Ultra AE at $670, versus $900 for the Dreame L50 Ultra, checked Oct 31, 2026. Over 3 years with running costs: $670 vs $1,194.

### What is the difference between the L40s Ultra AE and the L50 Ultra?

Suction: 19,000 Pa claimed (Dreame) on the L40s Ultra AE, 19,500 Pa Vormax (brand claim); Vacuum Wars did not publish airflow for this model on the L50 Ultra. Navigation: LDS LiDAR (Dreame); Vacuum Wars measured 0.87 m2 per minute against a 0.70 average on the L40s Ultra AE, LiDAR laser navigation on the L50 Ultra. Obstacle avoidance: RGB AI camera plus 3D structured light, 120+ obstacle types (Dreame); Vacuum Wars saw it… on the L40s Ultra AE, RGB camera plus 3D structured light with LED lights, 180+ object types (brand claim)… on the L50 Ultra.

Full reviews: [Dreame L40s Ultra AE](https://robotsforthat.com/robot/dreame-l40s-ultra-ae/index.md), [Dreame L50 Ultra](https://robotsforthat.com/robot/dreame-l50-ultra/index.md)