Roborock S8 Max Ultra vs Shark AI Ultra 2-in-1 Robot Vacuum and Mop

The Roborock S8 Max Ultra is the more capable system: its dock refills and drains water, washes and dries the mop with hot water, and dispenses detergent, so you rarely touch it. The Shark AI Ultra is the simpler, lighter choice with a bagless HEPA base and strong suction, but you fill its water tank and wash its pads yourself. Owners rate the Roborock higher, though on far fewer reviews; the Shark's much larger review base is more mixed. Buy the Roborock for hands-off mopping on mixed floors, the Shark for carpet-first cleaning with allergen control.

• Choose the Roborock S8 Max Ultra if you want mopping that runs itself, with the dock refilling water, draining dirty water, and washing and drying the pads.
• Choose the Shark AI Ultra if carpet and pet hair come first and you want a bagless HEPA base without plumbing a dock to a water line.