iRobot’s Roomba j9+ ($599-$799) and Roborock’s S8 MaxV Ultra ($1,200-$1,400) represent the top tier of robot vacuums for pet households. Both feature anti-tangle brush systems, self-emptying bases, obstacle avoidance that recognizes pet waste, and HEPA-level filtration. The price gap is significant — the Roborock costs nearly double — but it adds mopping capability, stronger suction, and a more comprehensive dock. The question is whether those extras justify the premium for pet owners.
I tested both robots in a home with a Labrador Retriever and two cats over four weeks, running each daily on alternating schedules. Here’s how they compare on every metric that matters for pet hair management.
Pet Hair Pickup Performance
Dual rubber extractors pulled 94% of embedded pet hair from medium-pile carpet. On hardwood, pickup was 97%. The three-stage cleaning system provides strong suction that handles both surface hair and embedded fur. Performance was consistent across 28 days of testing with no degradation.<br />
DuoRoller Riser brush with 10,000 Pa suction pulled 97% of embedded pet hair from carpet — the highest score. On hardwood, pickup was 99%. The brush auto-lifts on carpet for deeper cleaning. Suction power is measurably stronger than the Roomba, particularly on deep-pile carpet.<br />
Roborock’s 10,000 Pa suction outperforms the Roomba on carpet by a meaningful margin (97% vs 94%). On hardwood, both are excellent. For homes with deep carpet and heavy shedders, the Roborock’s superior suction makes a noticeable difference. For hardwood-dominant homes, the gap is negligible.<br />
Tangle Resistance
Dual rubber extractors are iRobot’s signature anti-tangle solution. Rubber doesn’t wrap hair the way bristles do. In 28 days of daily operation with long cat hair and Labrador fur, the extractors needed manual detangling once. Rubber design is proven over multiple Roomba generations.<br />
DuoRoller Riser uses a combination of rubber and bristle elements. The auto-lift feature reduces carpet contact when not needed. In 28 days, the brush needed detangling three times — primarily from long cat hair wrapping around the bristle sections. Better than pure bristle designs but not as tangle-free as Roomba’s all-rubber approach.<br />
Roomba’s all-rubber extractor design is genuinely superior for tangle resistance. One detangling session versus three over a month is a meaningful maintenance difference. For households with long-haired pets, this advantage compounds over time.<br />
Obstacle Avoidance
PrecisionVision navigation uses a front-facing camera to identify and avoid obstacles including pet waste, shoes, cables, and pet toys. Pet waste avoidance was 100% reliable in testing — the robot never ran over simulated pet waste. Navigation is methodical but occasionally misses spots in complex room layouts.<br />
3D structured light + RGB camera provides the most detailed obstacle recognition tested. Identified pet toys, cables, shoes, and pet waste with near-perfect accuracy. The 3D depth perception allows the robot to navigate closer to obstacles without contact, resulting in more thorough cleaning near furniture legs and pet bowls.<br />
Roborock’s 3D structured light system provides more precise obstacle detection and closer-to-obstacle cleaning. Both avoid pet waste reliably, but Roborock navigates complex environments more efficiently, resulting in fewer missed spots and faster completion times.<br />
Self-Emptying & Dock
Clean Base holds 60 days of debris in sealed bags. Bags prevent dust and allergen release during emptying. Replacement bags cost $15 for a 3-pack. Dock footprint is moderate. Emptying cycle is loud (70+ dB) but brief (10 seconds).<br />
All-in-one dock handles self-emptying, mop washing with hot water, and mop drying with hot air. Bagless dustbin (empty manually every 7-10 weeks). Dock also refills the robot’s water tank for mopping. Larger footprint but eliminates multiple maintenance tasks. Emptying cycle is similarly loud.<br />
Roborock’s all-in-one dock is more comprehensive — it handles vacuuming waste, mop maintenance, and water management in one station. Roomba’s sealed bag system is more hygienic for allergen-sensitive households (no dust release during emptying), but the Roborock’s dock does more overall.<br />
Mopping Capability
No mopping capability. The j9+ is a vacuum-only robot. For mopping, iRobot sells the Braava jet m6 separately ($350-$450), which can be paired with the Roomba for sequential vacuum-then-mop operation.<br />
Built-in VibraRise 2.0 mopping system with vibrating mop pads that scrub at 4,000 RPM. Auto mop lift raises pads on carpet to prevent wetting. Mop pads washed and dried automatically in the dock. Handles dried paw prints, drool spots, and tracked litter effectively.<br />
This is a clear Roborock advantage. The integrated mopping with auto carpet detection means one robot handles both vacuuming and mopping in a single run. For pet homes with hard floors (where paw prints and drool are common), the mopping capability is genuinely valuable.<br />
Price & Value
$599-$799 for robot + Clean Base. Ongoing cost approximately $30/year for replacement bags. No mopping (add $350-$450 for Braava). Total vacuum + mop system $950-$1,250. Proven reliability with extensive support network.<br />
$1,200-$1,400 for robot + all-in-one dock. Minimal ongoing costs (replacement mop pads $15-$20 every 2-3 months). Includes vacuum + mop in one system. Higher upfront but no additional robot needed for mopping.<br />
As a vacuum-only solution, the Roomba is significantly more affordable. However, when you factor in the cost of adding a Braava for mopping, the total system cost approaches the Roborock’s price. For vacuum-only needs, Roomba wins on value. For vacuum + mop, Roborock is actually competitive.<br />
The Bottom Line
Choose the Roomba j9+ if you primarily need vacuuming, have mostly carpet, and value the proven tangle-free rubber extractor system. It’s the more affordable option for vacuum-only pet hair management, and iRobot’s support network is the most established in the industry.
Choose the Roborock S8 MaxV Ultra if you want the most capable all-in-one cleaning robot — stronger suction, integrated mopping, and a comprehensive dock that handles all maintenance. The premium price is justified for homes with mixed flooring where both vacuuming and mopping are needed daily.
For pet owners specifically, the tangle resistance question often tips the decision. If you’re tired of detangling hair from brush rolls, the Roomba’s rubber extractors are the best solution available. If maximum cleaning performance and mopping capability matter more, the Roborock delivers on both.