Dreame L40 Ultra Gen 2 vs Roborock Qrevo S Pro

Dreame L40 Ultra Gen 2
69

$569.98$749.99

4.4 (955)
from $569.98
Roborock Qrevo S Pro
42

$399.99$699.99

4.1 (6.9k)
from $399.99

The L40 Ultra Gen 2 leads on specs, ahead in 2 of 3 areas.

The L40 Ultra Gen 2 wins 1 of the 1 specs where they clearly differ. The Qrevo S Pro costs $169.99 less. Biggest difference: suction power (25,000 Pa vs 18,500 Pa).

Biggest differences

L40 Ultra Gen 2Qrevo S Pro
Qrevo S Pro · Cleaning: 25 Qrevo S Pro · Navigation: 75 Qrevo S Pro · Dock: 25 L40 Ultra Gen 2 · Cleaning: 75 L40 Ultra Gen 2 · Navigation: 50 L40 Ultra Gen 2 · Dock: 100 Cleaning 75 · 25 Navigation 50 · 75 Dock 100 · 25

Not enough data to chart: Power & Noise.

  1. Suction power Peak suction in pascals as stated by the maker. Above ~8,000 Pa the difference on hard floors is small; it matters most on thick carpet.

    L40 Ultra Gen 2 · 35% higher
    L40 Ultra Gen 2
    25,000 Pa
    Qrevo S Pro
    18,500 Pa

  2. Home Assistant Core integrations ship with Home Assistant. HACS integrations are community-maintained and can break after updates.

    No better or worse
    L40 Ultra Gen 2
    HACS
    Qrevo S Pro
    Core integration

All 27 specs in the record

Based on 5 and 4 scored specs of 6. Unknown specs are skipped. How we score

Pick the L40 Ultra Gen 2 if…

  • you want more suction power: 25,000 Pa vs 18,500 Pa

Pick the Qrevo S Pro if…

  • you want to spend less — it’s $169.99 cheaper

Best price now

L40 Ultra Gen 2

Price as of 4 Nov 2026 · amazon.com

Qrevo S Pro

Price as of 4 Nov 2026 · amazon.com

We earn a commission on purchases, and it never affects a score. As an Amazon Associate I earn from qualifying purchases.

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The full record

27 specs, grouped by area.

1. Cleaning

L40 Ultra Gen 2
Fact L40 Ultra Gen 2Qrevo S Pro Margin
Suction power Peak suction in pascals as stated by the maker. Above ~8,000 Pa the difference on hard floors is small; it matters most on thick carpet. 25,000 Pa 18,500 Pa +35%
Mopping system Rotating pads and roller mops scrub; static pads only wipe. Look for mop lifting if you have carpets. Rotating pads Rotating pads
Mop lift height How far the mop lifts on carpet. 10 mm+ keeps most rugs dry; some models detach pads entirely. 10.5 mm 10 mm +5%
Carpet detection An ultrasonic or optical sensor that boosts suction and avoids mopping on carpet. Yes Yes

2. Navigation

Qrevo S Pro
Fact L40 Ultra Gen 2Qrevo S Pro Margin
Navigation LiDAR maps fast and works in the dark. Camera (vSLAM) needs light but is cheaper. Gyro cleans in lines without a real map. LiDAR LiDAR
Obstacle avoidance AI cameras recognise cables, socks and pet waste. Structured light sees shapes but not what they are. 3D structured light 3D structured light
Multi-floor maps Number of floor plans it can store. Useful if you carry it between floors. 4 maps ?
Robot height Lower robots fit under more sofas and beds. Measure your lowest furniture gap. 9.7 cm 9.65 cm −1%

3. Dock

L40 Ultra Gen 2
Fact L40 Ultra Gen 2Qrevo S Pro Margin
Self-emptying The dock sucks the dust bin empty into a bag. Saves emptying the robot after every run. Yes Yes
Mop washing Hot-water washing removes grease better and reduces smell. ? Hot water
Mop drying Warm-air drying temperature. Without it, damp pads can smell within a day. ? 45 °C
Dust bag capacity A 3 L bag lasts roughly 6–8 weeks in an average home. 3.2 L ?

4. Power & Noise

Even
Fact L40 Ultra Gen 2Qrevo S Pro Margin
Runtime On the lowest suction setting. Expect about half on max power. 231 min ?
Noise level Every 3 dB is roughly a doubling of sound energy. Under 60 dB is fine for running while you are home. ? ?

5. Connectivity
Fact L40 Ultra Gen 2Qrevo S Pro Margin
Wi-Fi 2.4 GHz has longer range. Dual band helps in crowded apartment buildings. ? 2.4 GHz
Thread Low-power mesh used by Matter. Needs a Thread border router (HomePod mini, Nest Hub, SkyConnect…). ? No
Zigbee Mature mesh protocol. Works locally with Zigbee2MQTT or ZHA in Home Assistant. ? No
Bluetooth Usually only for setup or short-range control. ? No

6. Integrations
Fact L40 Ultra Gen 2Qrevo S Pro Margin
Matter Works with every major platform locally. Check which device types are supported — some features may stay app-only. ? ?
Home Assistant Core integrations ship with Home Assistant. HACS integrations are community-maintained and can break after updates. HACS Core integration
Alexa Yes Yes
Google Home Yes Yes
Apple Home ? ?

7. Privacy & Local Control
Fact L40 Ultra Gen 2Qrevo S Pro Margin
Works offline Keeps working with your internet down — schedules, automations and local apps still run. ? ?
Cloud account required You must create a manufacturer account to set it up. Some devices stop working if the cloud shuts down. ? Yes
Subscription for key features Features locked behind a monthly fee, e.g. history, AI detection or remote access. ? ?
Firmware updates via HA Update the firmware from Home Assistant without the vendor app (Zigbee2MQTT OTA, Matter OTA). ? ?

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