Roborock - S8 Pro Ultra vs Yeedi - Cube

The Cube edges ahead on the Mars Score (57.7 vs 61.3), but the 3.6-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the S8 Pro Ultra if you care most about ai obstacle avoidance. The biggest gaps in its favor are ai obstacle avoidance.

Pick the Cube if you care most about suction and water tank. Its strongest claims are suction, water tank, noise.

Both ship with comparable mopping, lidar, battery life, 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.