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Robot Autonomy, Classified
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ComparisonRoborock Qrevo S and iRobot Roomba Plus 678 Combo

Up to three

All robot vacuums. Every figure below is placed against the whole class, so a gap can be read against how much the class itself varies.

Where each one suits you.

The conditions each robot was assessed against, side by side. Rows marked in gold are where these machines genuinely differ.

Fit verdicts by condition for each robot
Condition Roborock Qrevo S Roomba Plus 678 Combo
Home size
Under 1,500 sqft Good120-min runtime exceeds typical compact-home cleaning cycles. Capable but overkill for small spaces. GoodRecharge-and-resume and retained LiDAR mapping comfortably cover a compact single-level home in one scheduled run.
1,500 – 3,000 GoodRuntime covers 1,500-2,500 sqft in one pass. Rotating pads effective on typical mid-size floor mixes. GoodSystematic LiDAR mapping and recharge-and-resume are built for this range; typical single-level layouts complete in one scheduled run.
Over 3,000 Depends120-min runtime may require two passes on 3,500+ sqft homes. Multi-floor support available but with separate dock runs. DependsIndependent multi-level or large-home coverage testing does not yet exist for this model; recharge-and-resume adds passes rather than eliminating them.
Primary floors
Hard floors GoodDual rotating pads optimized for hard floors. Suction and pad coverage both rated for hard surfaces. GoodThe PowerSpin roller and LiDAR navigation are built around hard-floor vacuum-plus-mop runs.
Low / medium pile GoodRotating pads designed for low-pile carpet transitions. Owner reports consistent performance. GoodThe roller auto-lifts on low-pile carpet detection; suction performance on carpet is not independently benchmarked.
High pile / shagthey differ PoorRotating pads not designed for high-pile or shag carpet. Manufacturer documentation does not recommend. DependsNo independent suction or high-pile test results are documented for this model, and rated suction trails the Max-tier sibling.
Mopping needs
Vacuum only GoodStrong vacuum; the mop lifts or detaches when not needed. GoodStrong vacuum; the mop lifts or detaches when not needed.
Light mopping GoodActive mopping system covers routine floors easily. GoodActive mopping system covers routine floors easily.
Frequent mopping GoodPressure or rotating mop with self-wash is built for frequent mopping. GoodPressure or rotating mop with self-wash is built for frequent mopping.
You want to…
Empty bin myself GoodDock automation handles some tasks, but monthly water chamber cleaning and quarterly pad swaps are required. GoodThe dock automates roller washing and bin emptying, but a hands-on reader can still top off concentrate and run manual clean cycles.
Empty occasionally GoodAuto-dock mop washing and dust emptying reduce hands-on effort. Monthly descaling and quarterly pad replacement are the main manual tasks. GoodThe AutoWash dock's self-wash and self-empty cycles handle most routine upkeep between periodic concentrate refills and bag swaps.
Set-and-forgetthey differ PoorQuarterly pad replacement and monthly dock maintenance prevent fully hands-off operation. DependsThe dock automates washing and emptying, but the concentrate reservoir and self-empty bag still need periodic manual refills, so it is not fully hands-off.

A robot being poor for a condition is a fact about fit, not a fault. “Depends” means the record names a limit worth reading, not that the answer is unknown.

Keep going.

The full recordRoborock Qrevo SSpecifications, evidence, the Fit Check in full, and every tracked change.The full recordiRobot Roomba Plus 678 ComboSpecifications, evidence, the Fit Check in full, and every tracked change.

Robovations classifies robots; it does not rank them. Nothing on this page is a recommendation, and no manufacturer influences a classification or its placement here.