Dreame - L40 Ultra vs Roborock - Qrevo Master

The L40 Ultra edges ahead on the Mars Score (68.2 vs 64.9), but the 3.3-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the L40 Ultra if you care most about battery life and suction. The biggest gaps in its favor are battery life, suction, water tank.

Pick the Qrevo Master if you care most about noise. Its strongest claims are noise.

Both ship with comparable mopping, lidar, self-empty base, so those specs don't separate the two — focus on the differences below.

Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity tells you both are well-rounded; the differences are about trade-offs, not quality.