Dreame L40 Ultra vs Dreame X50 Ultra
3 questions both answer, side by side. Every answer is backed by the dated sources at the bottom.
Side by side
Can a robot vacuum get over high door thresholds?
Dreame says the L40 Ultra crosses obstacles up to 0.86 inches (22 mm).
Good to know: Figure from Dreame's lab.
The X50 Ultra climbs over raised thresholds on its own; Dreame quotes up to 6 cm.
Good to know: One threshold in a hands-on review only worked after it was marked passable in the app.
Can a robot vacuum keep its wet mop off the carpet?
Dreame lists a 10.5 mm mop lift for the L40 Ultra, and says it lifts or removes the mops to keep carpets dry.
Good to know: Listed spec.
The Dreame X50 Ultra lifts its mop pads 10 mm on carpet and can leave them at the dock.
Good to know: Listed spec, not measured.
Can a robot vacuum pick up pet hair without tangling?
Consumer Reports lists the Dreame L40 Ultra among its top picks for picking up embedded pet hair.
Good to know: Consumer Reports' lab test (March 2026). Dreame's anti-tangle TriCut brush is sold separately.
The Dreame X50 Ultra scored 97.5 on Vacuum Wars' flattened pet hair pickup test, with zero wraps in their 7-inch hair tangle test.
Good to know: Lab test on one unit.
Only checked for one of them
Can a robot vacuum deep-clean carpet?
The Dreame X50 Ultra scored 83 in the carpet deep-clean test, the lowest of these four.
Good to know: Lab test on one unit; it still had the best pet hair pickup of the four.
How we know (5 sources)
Lab test of robot vacuums on pet hair (1 g of cat fur embedded in carpet). Some robots drag hair around or tangle it in the brush; the best pick up almost all of it. Top picks: Dreame L40 Ultra, Dyson 360 Vis Nav, Eufy C10, Eureka NERE10SW, iRobot Roomba Max 705, Samsung Jet Bot. Many vacuum-mop combos struggled with dried stains. Notes iRobot filed for bankruptcy the previous December and said app and support would continue.
Read the sourceUS Dreame L40 Ultra page (read Oct 24, 2026): $799.99. Mop lifting height 10.5 mm (0.4 in), and it lifts or removes the mops to keep carpets dry; crosses obstacles up to 0.86 in (22 mm), per Dreame's lab. 11,000 Pa suction; works with Alexa, Siri and Google Home. An anti-tangle TriCut brush is sold separately.
Read the sourceAnnouncement coverage of the Dreame X50 Ultra, quoting an obstacle-crossing height of 6 cm.
Read the sourceTwo-month hands-on review of the Dreame X50 Ultra. It climbed raised laundry and bathroom thresholds on its own; one ensuite threshold only worked after the reviewer marked it passable in the app.
Read the sourceTest and spec page for the Dreame X50 Ultra, read Oct 22, 2026. Lab results: carpet deep clean 83, flattened pet hair pickup 97.5, zero wraps in the 7-inch hair tangle test. Specs: two spinning mop pads that lift 10 mm on carpet and can be left at the dock; 60 mm threshold climbing.
Read the source