Roborock Qrevo CurvX vs Roborock S8 MaxV Ultra: New-Gen Slim vs Previous-Gen Flagship

Cleaning Performance

The CurvX’s 22,000Pa suction is 2.2x the S8 MaxV Ultra’s 10,000Pa. On carpet, this translates to meaningfully better embedded dirt extraction — the CurvX pulls more sand and debris from medium and deep pile. The CurvX’s DuoDivide brush achieves a 0% hair tangle rate, eliminating maintenance from hair wrapping.

The S8 MaxV Ultra scored 96.4% debris removal by weight in lab testing, which was excellent for its generation. But newer motors have moved the bar, and 10,000Pa simply can’t keep up with 22,000Pa on thick carpet.

For mopping, the CurvX uses dual spinning pads with FlexiArm for edge coverage and warm water onboard. The S8 MaxV Ultra’s VibraRise 3.0 vibrating pads scrub at 4,000 times per minute and lift 20mm over carpet. Different mopping approaches — the CurvX covers edges better, the S8 MaxV Ultra scrubs harder in the center.

Winner: Roborock Qrevo CurvX — 2.2x the suction and 0% hair tangling. The S8 MaxV Ultra’s vibrating mop is strong but can’t overcome the suction deficit.

Navigation & Obstacle Avoidance

The S8 MaxV Ultra uses LiDAR, 3D structured light, and an RGB camera with Reactive AI 2.0. The RGB camera enables pet waste avoidance, video monitoring, and better object classification. It recognizes a wide range of obstacles and can distinguish between a sock and a cable.

The CurvX uses LiDAR with Reactive AI structured light but lacks an RGB camera. No pet waste detection, no video streaming. Its obstacle avoidance is solid for general objects but cannot visually identify specific items the way the S8 MaxV Ultra can.

The CurvX’s AdaptiLift chassis crosses thresholds up to 4cm — a meaningful advantage in homes with door tracks or carpet transitions. The S8 MaxV Ultra handles standard thresholds but lacks the same elevation capability.

Winner: Roborock S8 MaxV Ultra — The RGB camera provides pet waste avoidance and superior object classification that the CurvX cannot match. The CurvX’s threshold crossing partially offsets this, but camera-based detection is a genuine safety feature.

Dock & Maintenance

The CurvX’s Thermo+ dock washes mops at 176F with hot water, dries at 113F with warm air, auto-empties the dustbin, and auto-refills water. The detachable base makes cleaning the dock itself easier.

The S8 MaxV Ultra’s 8-in-1 RockDock Ultra offers hot water wash, hot-air dry, auto-empty, auto water refill, and adds auto detergent dispensing — it injects cleaning solution into every mop wash cycle. The optional Refill & Drainage System connects to home plumbing for zero-maintenance water management.

The auto detergent and plumbed option are features no other robot in this comparison offers at this price. If you want truly hands-free operation, the S8 MaxV Ultra’s dock has the edge.

Winner: Roborock S8 MaxV Ultra — Auto detergent and optional plumbed water system provide genuinely lower maintenance than the CurvX’s already-excellent dock.

Battery & Runtime

The S8 MaxV Ultra runs 180 minutes per charge versus the CurvX’s 150 minutes — 20% longer. For homes over 2,000 square feet, the S8 MaxV Ultra’s extra 30 minutes provides a meaningful buffer against mid-clean recharging.

Both robots handle typical homes on a single charge. The gap only matters in larger spaces.

Winner: Roborock S8 MaxV Ultra — 30 minutes more runtime. Not dramatic, but consistent.

Value & Price

The CurvX at $799-899 (typically $849) costs $100 less than the S8 MaxV Ultra at $899-1,799 (typically $949). For $100 less, the CurvX delivers 2.2x the suction, a profile nearly an inch slimmer (3.14 vs 4.06 inches), FlexiArm edge mopping, and 0% hair tangling.

The S8 MaxV Ultra’s $100 premium buys an RGB camera, auto detergent, optional plumbed water, and 30 more minutes of battery. These are legitimate features, but they don’t outweigh 2.2x more suction and an inch less height for $100 less.

The CurvX represents Roborock’s current generation at an upper-mid price. The S8 MaxV Ultra is the previous generation whose price has dropped but whose specs show their age. Unless you specifically need the RGB camera or plumbed water, the CurvX is the smarter buy.

Winner: Roborock Qrevo CurvX — More suction, slimmer profile, lower price. The S8 MaxV Ultra’s unique dock features are nice but don’t justify buying a weaker, taller, more expensive robot.