Ecovacs - Deebot X8 Pro Omni vs Roborock - S9 MaxV Ultra

These two are nearly even on the Mars Score (82.2 vs 85.1). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.

Pick the Deebot X8 Pro Omni if you care most about battery life and noise. The biggest gaps in its favor are battery life, noise.

Pick the S9 MaxV Ultra if you care most about suction and water tank. Its strongest claims are suction, water tank.

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.