Dreame L40s Ultra AE vs Roborock Qrevo Curv S5X: Which to Buy

The Roborock Qrevo Curv S5X is the better robot vacuum overall, rated 4.4 to 4.2. The Roborock Qrevo Curv S5X leads on cleaning. The Dreame L40s Ultra AE wins on navigation. The Roborock Qrevo Curv S5X costs $70 less ($599.99 vs $669.99).

Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.

Higher rated

Roborock Qrevo Curv S5X

#7 in Self-cleaning dock4.4Full review

For buyers who want the Qrevo Curv’s cleaning features and round dock at a lower price, without its threshold-climbing chassis.

Amazon $599.99

$599.99

Dreame L40s Ultra AE

#41 in Self-cleaning dock4.2Full review

For buyers who want an AI camera for obstacle avoidance and remote viewing on a full self-cleaning dock; for carpet and pet hair, the plain L40s Ultra measured better.

Amazon $669.99

$669.99

Which should you buy?

Choose the Roborock Qrevo Curv S5X for cleaning (measured 93% of sand from carpet, 89.2% of pet hair, no hair tangled vs measured 85% of sand from carpet, 80.8% of pet hair, no hair tangled).
Choose the Dreame L40s Ultra AE for navigation (LiDAR + camera vs LiDAR + 3D light).

Scores side by side

Each factor is scored 0-100 against the same fixed reference points for every self-cleaning dock robot vacuum; a clear win is highlighted. How we rank explains each one.

Factor weight	Roborock Qrevo Curv S5X	Dreame L40s Ultra AE
Overall rating	4.4/5	4.2/5
Cleaning 30%	90 measured 93% of sand from carpet, 89.2% of pet hair, no hair tangled	66 measured 85% of sand from carpet, 80.8% of pet hair, no hair tangled
Value 25%	67 $600	60 $670
Dock 20%	100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, optional water hookup	100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent
Navigation 15%	85 LiDAR + 3D light	100 LiDAR + camera
Mopping 10%	76 Dual spinning pads, lifts 10 mm, extends to edges	76 Dual spinning pads, lifts 10.5 mm, extends to edges

Independent tests

Roborock Qrevo Curv S5X

Tested by	Carpet deep clean	Pet hair	Hair tangle (0 = none)	Area per charge	Conditions
Vacuum Wars	93%	89.2%	0	1,528 sq ft	Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet; 7 in hair tangle on hard floor (0 = none wrapped).