- Which has stronger suction?
- The Ecovacs X11 OmniCyclone at 19,500Pa versus 6,000Pa for the Roborock S8 Pro Ultra. That gap matters most on carpet and with pet hair.
- Which is better for pet hair?
- The X11. Its ZeroTangle 3.0 brush is built for hair, and reviewers praise its pet hair handling. The S8 Pro Ultra's dual roller is capable but has less suction behind it.
- Does either dock need dust bags?
- Only the Roborock. The X11's OmniCyclone station is bagless. The S8 Pro Ultra uses bags rated for up to 7 weeks each.
- Which mops better?
- The S8 Pro Ultra lifts its dual brush and scrubs with a sonic mop at 3,000 times per minute, and it refills itself from a 3.5L tank. The X11 uses a single roller at 200rpm.
- Is the X11 worth the extra money?
- At its $599.00 low on 2026-11-02 it is clearly worth it for the suction and bagless dock. At $1,099.99 on 2026-10-31 the case is weaker, and the S8 Pro Ultra's self-refilling dock becomes more attractive.
- How long does each run on a charge?
- Up to 254 minutes for the X11 and up to 180 minutes for the S8 Pro Ultra. The X11 also charges fast, adding 6% in 3 minutes.
