Dreame L40 Ultra vs Roborock Saros 10R
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.
Roborock says the Saros 10R's liftable chassis crosses thresholds up to 1.57 inches (about 4 cm), including double-layer thresholds.
Good to know: Maker's figure; not tested independently in our sources.
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.
Roborock says the Saros 10R's mops lift up to 22 mm when its chassis is lifted.
Good to know: Based on Roborock's own testing.
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.
Roborock says the Saros 10R's DuoDivide main brush and anti-tangle side brush ensure a 0% hair tangling rate.
Good to know: Maker's claim; not in Vacuum Wars' pet hair data.
Only checked for one of them
Can a robot vacuum work without Wi-Fi?
Roborock says its robot vacuums can clean the whole home, spot-clean and return to the dock at the push of a button without Wi-Fi.
Good to know: Roborock's general FAQ, not specific to the Saros 10R.
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 sourceUS Saros 10R page (read Oct 24, 2026): AdaptiLift chassis crosses thresholds up to 1.57 inches (about 4 cm), including double-layer thresholds. Roborock says, based on its own testing, the mops lift up to 22 mm when the chassis is lifted. Dual anti-tangle system with a DuoDivide main brush that Roborock says ensures a 0% hair tangling rate. StarSight 2.0 navigation and VertiBeam lateral obstacle avoidance.
Read the sourceRoborock support FAQ "Can the robot vacuum work without Wi-Fi?" (read Oct 24, 2026): its robot vacuums can do full-home and spot cleaning and return to the dock at the push of a button without Wi-Fi, and handle basic voice commands. Wi-Fi unlocks advanced features such as scheduled cleaning and suction-power selection.
Read the source