Dreame L40 Ultra vs Eufy Omni S2
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 Omni S2 is listed for thresholds up to 42 mm, well below the step-climbing Roborock and Dreame models.
Good to know: Listed spec, not a measured result.
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 Omni S2 lifts its roller mop 28 mm on carpet, the highest lift listed here.
Good to know: Listed spec. The roller stays on the robot; it can't be left at the dock.
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 Omni S2 scored 88.5 on the pet hair pickup test with zero tangles.
Good to know: Lab test on one unit.
Only checked for one of them
Can a robot vacuum avoid pet poop?
The Omni S2 avoided all 24 objects, including simulated pet waste, in Vacuum Wars' obstacle course.
Good to know: Lab course with stand-ins, not real waste, and no replacement promise like iRobot's.
Can a robot vacuum deep-clean carpet?
The Omni S2 scored 87 in the carpet deep-clean test.
Good to know: Lab test on one unit.
How we know (4 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 sourceObstacle-avoidance ranking (last updated Oct 21, 2026) from a standardized 24-object course that includes simulated pet waste, plus a cluttered torture test. The Eufy Omni S2 avoided all 24 objects; the Mova V70 Ultra Complete avoided 23. Notes that top-mounted LiDAR can miss low objects, so front cameras and sensors do the avoiding.
Read the sourceTest and spec page for the Eufy Omni S2, read Oct 22, 2026. Lab results: carpet deep clean 87, flattened pet hair pickup 88.5, zero wraps in the 7-inch hair tangle test. Specs: one roller mop that lifts 28 mm on carpet and stays on the robot; 42 mm threshold climbing.
Read the source