# Dreame L40 Ultra Gen 2 vs Dreame L40s Ultra CE

As of Oct 31, 2026, the Dreame L40 Ultra Gen 2 costs $570 and the Dreame L40s Ultra CE costs $470, so the Dreame L40s Ultra CE is $100 cheaper. Pick the Dreame L40 Ultra Gen 2 for tidy hard floor homes that want strong mopping. Pick the Dreame L40s Ultra CE for first time buyers who want a full dock cheaply.

Prices checked Oct 31, 2026. HTML version: https://robotsforthat.com/vs/dreame-l40-ultra-gen-2-vs-dreame-l40s-ultra-ce/

## Side by side

| | Dreame L40 Ultra Gen 2 | Dreame L40s Ultra CE |
|---|---|---|
| Price | $570 | $470 |
| 3 year cost | $610 | $510 |
| Our score | Not scored yet | Not scored yet |
| Rank in Floors | #58 | #53 |
| Status | on sale | on sale |
| Warranty | 3 years (Dreame US store) | 3 years (Dreame US store) |
| Suction | 25,000 Pa claimed (Dreame); Vacuum Wars measured 0.79 kPa bench suction against a 0.99 kPa average, and Vacuum Chef measured 11.5 CFM airflow against a 9.0 average | 13,000 Pa on the Dreame product page and comparison blog |
| Navigation | LDS LiDAR, up to 4 maps (Dreame); Vacuum Wars measured 0.84 m2 per minute, faster than its 0.72 average | LDS LiDAR with Smart Pathfinder (Dreame); Vacuum Wars measured 0.73 m2 per minute |
| Obstacle avoidance | 3D structured light only; the RGB camera of the original L40 Ultra was removed (Dreame, Vacuum Wars); Vacuum Wars saw it avoid 2 of 24 objects and Vacuum Chef scored 30% | Single laser 3DAdapt structured light, no camera (Dreame); Vacuum Wars saw it avoid 8 of 24 objects |
| Mopping | Dual spinning mops, 10.5 mm lift, 4 cm extension, no auto removal (Dreame); Vacuum Wars scored dried stains 144 against a 108 average | Dual spinning mops with RoboSwing, 10.5 mm lift, no extension or auto removal (Dreame); Vacuum Wars measured 2.20 g water left, the most of the L40s range |
| Self empty | Yes, 3.2 L dust bag, up to 100 days (Dreame) | Yes, 3.2 L dust bag, up to 100 days (Dreame) |
| Dock features | Auto empty, mop wash, hot air drying, auto water refill, 4.5 L clean and 4.0 L dirty tanks; detergent dispenser sold separately for $39.99 (Dreame). Dreame lists hot water mop cleaning, but Vacuum Wars says Gen 2 washes with room temperature water | Auto empty, cool water mop wash, warm air drying, auto water refill, 4.5 L clean and 4 L used tanks; auto detergent dosing is a $39.99 add on (Dreame) |
| Runtime | Up to 231 min in quiet vacuum mode, up to 1,679 sq ft (Dreame); Vacuum Wars estimated about 1,290 sq ft per charge | Up to 260 min in quiet vacuum mode from 5,200 mAh (Dreame); Vacuum Wars estimated about 1,922 sq ft per charge |
| Dustbin | 250 ml robot bin plus 3.2 L dock bag (Dreame) | 300 ml or more plus 3.2 L dock bag (Dreame) |
| Height | 3.82 in (97 mm) (Dreame) | 104 mm (about 4.1 in) (Dreame) |
| Pet hair | Vacuum Wars measured 69% flattened pet hair pickup and 67% hair wrap on its 7 in hair test; carpet sand removal was 90% | TriCut Brush 3.0 (Dreame); Vacuum Wars measured 68% pet hair pickup, 89% carpet sand removal and 0% hair wrap |
| App | Dreamehome app with Alexa, Siri, Google Home and Apple Watch; Matter planned in an update (Dreame) | Dreamehome app with Alexa, Siri and Google Home through third party devices, no built in voice (Dreame) |
| Threshold | 0.79 in (2 cm) (Dreame) | 20 mm (Dreame product page); Dreame's comparison blog lists 22 mm in one section and 20 mm in another |
| Noise | Vacuum Chef measured 73 dB at max suction, about average | n/a |
| Best for | tidy hard floor homes that want strong mopping | first time buyers who want a full dock cheaply |
| Skip if | you have pets with long hair or a cluttered floor | you have pets, clutter or want hot water mop washing |

## What reviewers found

### Dreame L40 Ultra Gen 2

- Vacuum Wars (3.11 Vacuum Wars stars): Dried stain score 144 (108 average), 90% carpet sand removal, but 69% pet hair pickup, 67% hair wrap and only 2 of 24 obstacles avoided. Estimated about 1,290 sq ft per charge. [Source](https://vacuumwars.com/dreame-l40-ultra-gen-2-review/)
- Vacuum Chef: Measured 11.5 CFM airflow, 90% coffee, 60% sand and 98% cat litter pickup, 73 dB at max and a 30% obstacle avoidance score against a 66% average. Called it a rebalancing rather than an upgrade. [Source](https://vacuumchef.com/?p=12466)

### Dreame L40s Ultra CE

- Vacuum Wars (3.10 Vacuum Wars stars): 89% carpet sand removal, 68% pet hair pickup, 0% hair wrap, 8 of 24 obstacles avoided, about 1,922 sq ft per charge and 2.20 g of water left behind, the most of the three L40s models. Not in its Top 20. [Source](https://vacuumwars.com/dreame-l40s-series-review/)
- The Smart Home Hookup: Ranked it with the Mova P50 Ultra at the top for vacuuming among robots from the last three years and tied for first in mopping with the Narwal Flow. Noted the detergent dispenser is sold separately; listed $469.99 MSRP. [Source](https://www.thesmarthomehookup.com/?p=10269)

## Questions buyers ask

### Which is better, the Dreame L40 Ultra Gen 2 or the Dreame L40s Ultra CE?

Pick the Dreame L40 Ultra Gen 2 for tidy hard floor homes that want strong mopping. Pick the Dreame L40s Ultra CE for first time buyers who want a full dock cheaply.

### Which is cheaper?

The Dreame L40s Ultra CE at $470, versus $570 for the Dreame L40 Ultra Gen 2, checked Oct 31, 2026. Over 3 years with running costs: $610 vs $510.

### What is the difference between the L40 Ultra Gen 2 and the L40s Ultra CE?

Suction: 25,000 Pa claimed (Dreame); Vacuum Wars measured 0.79 kPa bench suction against a 0.99… on the L40 Ultra Gen 2, 13,000 Pa on the Dreame product page and comparison blog on the L40s Ultra CE. Navigation: LDS LiDAR, up to 4 maps (Dreame); Vacuum Wars measured 0.84 m2 per minute, faster than… on the L40 Ultra Gen 2, LDS LiDAR with Smart Pathfinder (Dreame); Vacuum Wars measured 0.73 m2 per minute on the L40s Ultra CE. Obstacle avoidance: 3D structured light only; the RGB camera of the original L40 Ultra was removed (Dreame… on the L40 Ultra Gen 2, Single laser 3DAdapt structured light, no camera (Dreame); Vacuum Wars saw it avoid 8 of… on the L40s Ultra CE.

Full reviews: [Dreame L40 Ultra Gen 2](https://robotsforthat.com/robot/dreame-l40-ultra-gen-2/index.md), [Dreame L40s Ultra CE](https://robotsforthat.com/robot/dreame-l40s-ultra-ce/index.md)