Robot Vacuum Comparison · UK 2026
Roborock Qrevo Curv vs Dreame L40s Pro Ultra

Specs, pros and cons compared side by side

Both the Roborock Qrevo Curv and the Dreame L40s Pro Ultra are robot vacuums with self-cleaning base stations. This head-to-head sets them side by side using the specs, pros and cons from our full reviews. Roborock specs for the Qrevo Curv come from Roborock’s help centre and CE manual; Dreame specs for the L40s Pro Ultra come from Dreame’s UK manual, with figures from Dreame’s UAE store page.

Quick verdict

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Roborock Qrevo Curv

Pick it for: 6,400mAh battery (the L40s Pro Ultra: 5,200mAh) · Climbs standard thresholds up to 3 cm (the L40s Pro Ultra: 22 mm single-layer steps) · Built-in voice assistant now (the L40s Pro Ultra gets “OK, Dreame” in a later update)

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Dreame L40s Pro Ultra

Pick it for: 19,000Pa suction (the Qrevo Curv: up to 18,500Pa) · Automatic detergent dosing (on the Qrevo Curv, you add solution to the clean water tank) · Shorter charge, about 3.5 hours (the Qrevo Curv: about 4)

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Quick comparison

Spec Roborock Qrevo Curv Dreame L40s Pro Ultra
Suction 18,500Pa 19,000Pa
Navigation LDS + structured light and RGB camera Pathfinder LDS + 3D dual-line laser, AI cameras
Mopping Rotating mops, auto lift, FlexiArm extending mop Extending mops (4 cm), 10.5 mm lift, mop removal
Dock Empty, 75°C wash, warm-air dry, refill Empty, 75°C wash, hot-air dry, refill, solution
Runtime Not stated Up to 125 min (vacuum and mop, quiet)
Smart home Built-in voice assistant (others not stated) Alexa, Siri, Google (OK Dreame by update)
Roborock Qrevo Curv

Pros

  • 75°C hot-water mop wash
  • Climbs double-layer thresholds up to 4 cm
  • Side brush and mop both extend for edges
  • Built-in voice assistant and remote viewing

Cons

  • No automatic detergent dispenser listed
  • Roborock does not publish the runtime or tank sizes
  • Roborock’s sources don’t list Alexa, Google Home, Siri or Matter
Dreame L40s Pro Ultra

Pros

  • 75°C hot-water mop wash
  • Climbs double-layer steps up to 40 mm
  • AI HD and IR cameras with an LED light
  • 125 minutes of vacuuming and mopping (quiet)

Cons

  • Plumbed-in refill and drain needs the separate water hookup kit
  • Built-in “OK, Dreame” voice control only comes with a later update
  • Dreame doesn’t list Matter support

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Which should you buy?

Why choose the Roborock Qrevo Curv

  • 6,400mAh battery (the L40s Pro Ultra: 5,200mAh)
  • Climbs standard thresholds up to 3 cm (the L40s Pro Ultra: 22 mm single-layer steps)
  • Built-in voice assistant now (the L40s Pro Ultra gets “OK, Dreame” in a later update)
Why choose the Dreame L40s Pro Ultra

  • 19,000Pa suction (the Qrevo Curv: up to 18,500Pa)
  • Automatic detergent dosing (on the Qrevo Curv, you add solution to the clean water tank)
  • Shorter charge, about 3.5 hours (the Qrevo Curv: about 4)

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