# Dreame L40 Ultra Gen 2 vs Roborock Qrevo S Pro

As of Oct 31, 2026, the Dreame L40 Ultra Gen 2 costs $570 and the Roborock Qrevo S Pro costs $500, so the Roborock Qrevo S Pro is $70 cheaper. Pick the Dreame L40 Ultra Gen 2 for tidy hard floor homes that want strong mopping. Pick the Roborock Qrevo S Pro for hard floors that need regular mopping.

Prices checked Oct 31, 2026. HTML version: https://robotsforthat.com/vs/dreame-l40-ultra-gen-2-vs-roborock-qrevo-s-pro/

## Side by side

| | Dreame L40 Ultra Gen 2 | Roborock Qrevo S Pro |
|---|---|---|
| Price | $570 | $500 |
| 3 year cost | $610 | $577 |
| Our score | Not scored yet | Not scored yet |
| Rank in Floors | #58 | #55 |
| Status | on sale | on sale |
| Warranty | 3 years (Dreame US store) | 1 year (Roborock 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 | 18,500 Pa (Roborock) |
| Navigation | LDS LiDAR, up to 4 maps (Dreame); Vacuum Wars measured 0.84 m2 per minute, faster than its 0.72 average | PreciSense LiDAR (Roborock); Vacuum Wars measured 0.86 m² per minute against a 0.71 average |
| 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% | Structured light Reactive Tech, no camera (Roborock); Vacuum Wars saw it avoid only 5 of 24 obstacles against a 16 average |
| 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 up to 200 rpm, 30 water levels, 10 mm lift (Roborock); Vacuum Wars combined mopping score 39.4 against a 31.1 average |
| Self empty | Yes, 3.2 L dust bag, up to 100 days (Dreame) | Yes, up to 65 days without manual emptying (Roborock) |
| 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 | Mop wash up to 167°F, 113°F warm air drying, auto refill; 4 L clean and 4 L dirty tanks (T3) |
| 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 | Vacuum Wars estimated about 1,495 sq ft per charge and up to 240 min; 5,200 mAh battery (Roborock) |
| Dustbin | 250 ml robot bin plus 3.2 L dock bag (Dreame) | 330 ml (Vacuum Wars) |
| Height | 3.82 in (97 mm) (Dreame) | 3.8 in (Roborock, T3) |
| 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% | Vacuum Wars measured 43% flattened pet hair pickup against an 82% average, with 62% of long hair wrapping |
| App | Dreamehome app with Alexa, Siri, Google Home and Apple Watch; Matter planned in an update (Dreame) | Roborock app; works with Alexa, Siri and Google Home; Matter promised by a future update (Roborock) |
| Threshold | 0.79 in (2 cm) (Dreame) | n/a |
| Noise | Vacuum Chef measured 73 dB at max suction, about average | T3 measured 64 dB vacuuming, 52 dB mopping and 70 dB emptying; Roborock lists under 60 dB in quiet vacuum mode |
| Best for | tidy hard floor homes that want strong mopping | hard floors that need regular mopping |
| Skip if | you have pets with long hair or a cluttered floor | you have shedding pets or cluttered floors |

## 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)

### Roborock Qrevo S Pro

- Vacuum Wars (2.70 Vacuum Wars stars): Strong mopping (39.4 vs 31.1 average) and 81% carpet deep clean, but 43% pet hair pickup, 62% long hair wrap and only 5 of 24 obstacles avoided. Estimated 1,495 sq ft per charge. [Source](https://vacuumwars.com/roborock-qrevo-s-pro-review/)
- T3: UK review measured 64 dB vacuuming, 52 dB mopping and 70 dB emptying. It switched well between carpet and hard floor, but missed some debris on textured rugs and handled large dried cereal poorly. [Source](https://www.t3.com/home-living/vacuum-cleaners/roborock-qrevo-s-pro-review-a-mid-priced-robot-vacuum-and-mop-with-a-high-end-cleaning-performance)

## Questions buyers ask

### Which is better, the Dreame L40 Ultra Gen 2 or the Roborock Qrevo S Pro?

Pick the Dreame L40 Ultra Gen 2 for tidy hard floor homes that want strong mopping. Pick the Roborock Qrevo S Pro for hard floors that need regular mopping.

### Which is cheaper?

The Roborock Qrevo S Pro at $500, versus $570 for the Dreame L40 Ultra Gen 2, checked Oct 31, 2026. Over 3 years with running costs: $610 vs $577.

### What is the difference between the L40 Ultra Gen 2 and the Qrevo S Pro?

Suction: 25,000 Pa claimed (Dreame); Vacuum Wars measured 0.79 kPa bench suction against a 0.99… on the L40 Ultra Gen 2, 18,500 Pa (Roborock) on the Qrevo S Pro. Navigation: LDS LiDAR, up to 4 maps (Dreame); Vacuum Wars measured 0.84 m2 per minute, faster than… on the L40 Ultra Gen 2, PreciSense LiDAR (Roborock); Vacuum Wars measured 0.86 m² per minute against a 0.71… on the Qrevo S Pro. Obstacle avoidance: 3D structured light only; the RGB camera of the original L40 Ultra was removed (Dreame… on the L40 Ultra Gen 2, Structured light Reactive Tech, no camera (Roborock); Vacuum Wars saw it avoid only 5 of… on the Qrevo S Pro.

Full reviews: [Dreame L40 Ultra Gen 2](https://robotsforthat.com/robot/dreame-l40-ultra-gen-2/index.md), [Roborock Qrevo S Pro](https://robotsforthat.com/robot/roborock-qrevo-s-pro/index.md)