# Dreame L40s Ultra vs Roborock Qrevo S Pro

As of Oct 31, 2026, the Dreame L40s Ultra costs $570 and the Roborock Qrevo S Pro costs $500, so the Roborock Qrevo S Pro is $70 cheaper. The Dreame L40s Ultra has a published review score and ranks #9 in our robot vacuums ranking; the Roborock Qrevo S Pro is not scored yet. Pick the Dreame L40s Ultra for pet owners with carpet on a budget. 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-l40s-ultra-vs-roborock-qrevo-s-pro/

## Side by side

| | Dreame L40s Ultra | Roborock Qrevo S Pro |
|---|---|---|
| Price | $570 | $500 |
| 3 year cost | $570 | $577 |
| Our score | 8.6/10 | Not scored yet |
| Rank in Floors | #9 | #55 |
| Status | on sale | on sale |
| Warranty | 3 years (Dreame US store) | 1 year (Roborock US store) |
| Suction | 19,000 Pa claimed (Dreame); Vacuum Chef measured 490 FPM carpet airflow, well above average | 18,500 Pa (Roborock) |
| Navigation | LDS LiDAR with Pathfinder, 4 maps (Dreame); Vacuum Wars measured 0.85 m2 per minute | PreciSense LiDAR (Roborock); Vacuum Wars measured 0.86 m² per minute against a 0.71 average |
| Obstacle avoidance | 3D structured light only, no camera or object count (Dreame); Vacuum Wars saw it avoid 7 of 24 objects | 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, extend and auto removal (Dreame); Vacuum Wars measured 0.95 g water left and a 259 combined mop score | 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, 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) | 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 220 min in quiet mode from 5,200 mAh (Dreame); Vacuum Wars estimated about 1,935 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 | 310 ml robot bin plus 3.2 L dock bag (Dreame) | 330 ml (Vacuum Wars) |
| Height | 3.82 in (Dreame) | 3.8 in (Roborock, T3) |
| Pet hair | HyperStream Detangling DuoBrush (Dreame); Vacuum Wars measured 91% pet hair pickup, 92% carpet sand removal and 0% hair wrap | Vacuum Wars measured 43% flattened pet hair pickup against an 82% average, with 62% of long hair wrapping |
| App | Dreamehome app with third party voice assistants only (Dreame); Vacuum Chef notes no built in voice assistant or live video | Roborock app; works with Alexa, Siri and Google Home; Matter promised by a future update (Roborock) |
| Threshold | 1.57 in double layer and 0.87 in single steps (Dreame) | n/a |
| Noise | Vacuum Chef measured 78 dB at max suction | T3 measured 64 dB vacuuming, 52 dB mopping and 70 dB emptying; Roborock lists under 60 dB in quiet vacuum mode |
| Best for | pet owners with carpet on a budget | hard floors that need regular mopping |
| Skip if | your floor often has cables, socks or toys | you have shedding pets or cluttered floors |

## What reviewers found

### Dreame L40s Ultra

- Vacuum Wars (3.51 Vacuum Wars stars): 92% carpet sand removal, 91% pet hair pickup and 0% hair wrap with the DuoBrush, about 1,935 sq ft per charge, but only 7 of 24 obstacles avoided. [Source](https://vacuumwars.com/dreame-l40s-series-review/)
- Vacuum Chef (95/100): Scored 95/100 in its real world cleaning tests, measured 490 FPM carpet airflow and 78 dB at max suction. Obstacle avoidance varied by floor and object. [Source](https://vacuumchef.com/dreame-l40s-ultra-review-powerful-suction-smart-mopping-real-world-performance-tested/?amp=1)

### 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 L40s Ultra or the Roborock Qrevo S Pro?

The Dreame L40s Ultra has a published review score and ranks #9 in our robot vacuums ranking; the Roborock Qrevo S Pro is not scored yet. Pick the Dreame L40s Ultra for pet owners with carpet on a budget. 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 L40s Ultra, checked Oct 31, 2026. Over 3 years with running costs: $570 vs $577.

### What is the difference between the L40s Ultra and the Qrevo S Pro?

Suction: 19,000 Pa claimed (Dreame); Vacuum Chef measured 490 FPM carpet airflow, well above… on the L40s Ultra, 18,500 Pa (Roborock) on the Qrevo S Pro. Navigation: LDS LiDAR with Pathfinder, 4 maps (Dreame); Vacuum Wars measured 0.85 m2 per minute on the L40s Ultra, 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, no camera or object count (Dreame); Vacuum Wars saw it avoid 7… on the L40s Ultra, Structured light Reactive Tech, no camera (Roborock); Vacuum Wars saw it avoid only 5 of… on the Qrevo S Pro.

Full reviews: [Dreame L40s Ultra](https://robotsforthat.com/robot/dreame-l40s-ultra/index.md), [Roborock Qrevo S Pro](https://robotsforthat.com/robot/roborock-qrevo-s-pro/index.md)