Dreame X40 Ultra Robot Vacuum vs Shark PowerDetect UV Reveal Robot Vacuum & Mop

Both are flagship robot vacuums with self-emptying, self-washing docks, but they solve different problems. The Dreame X40 Ultra leans on raw suction (12,000Pa), a liftable mop that rises 10.5mm to protect carpet, and a 198-minute runtime, so it suits homes with lots of carpet and large floors. The Shark PowerDetect UV Reveal leans on stain detection, aggressive mopping and a thermal-sanitizing base, so it suits hard floors and pet or toddler messes. Owners rate the Shark higher (4.6 vs 4.3), and reviewers flag its obstacle avoidance and bulky dock as the weak points; the Dreame's edge is power and carpet handling.

• Choose the Dreame X40 Ultra if you have mostly carpet or rugs and want the strongest suction, a mop that lifts clear of carpet, and long runtime.
• Choose the Shark PowerDetect UV Reveal if your home is mostly hard floor and you want stain detection, heavy scrubbing and a base that sanitizes the mop pad.