3i G10 Plus VS Roborock P20 Ultra

Both the 3i G10 Plus and the Roborock P20 Ultra share the same foundational features in this category: HEPA and allergy filtration, compatibility with both Google Assistant and Alexa, and a one-year warranty. For allergy sufferers or smart-home users, neither product has an edge here — they are functionally identical on these points.

Where things diverge meaningfully is in physical design. The P20 Ultra's robot unit is notably more compact — lighter at 3800 g vs 4220 g, and significantly slimmer at 79.8 mm tall compared to 109 mm, giving it better clearance under low furniture. Its overall unit volume is also smaller (9859 cm³ vs 13814 cm³). However, the trade-off is dramatic when it comes to the docking station: the P20 Ultra's dock is colossal at 88315 cm³ — roughly 45 times the footprint of the G10 Plus dock at 1964 cm³. This suggests the P20 Ultra's station houses far more onboard infrastructure (likely self-washing or drying systems), but it demands significant dedicated floor space. The G10 Plus dock, by contrast, is barely noticeable in a room.

Noise output is virtually identical (65 dB vs 64.5 dB), and the auto-empty intervals are close — 60 days for the G10 Plus vs 56 days for the P20 Ultra — so neither wins outright on convenience cycles. The clear edge goes to the G10 Plus if floor space for the dock is a constraint, while the P20 Ultra wins on robot body compactness for navigating tighter home environments — but only if you can accommodate its large base station.

On the core navigation and control feature set, these two robots are remarkably well-matched. Both support mapping, no-go zones, virtual barriers, route mapping, obstacle sensing, anti-fall sensors, carpet detection, scheduled cleaning, smartphone control, and auto-docking. For the vast majority of smart home use cases, either robot arrives fully equipped out of the box.

The real differentiation lies in the mopping system. The 3i G10 Plus supports mop raising and water level adjustment, but it lacks mop cleaning and mop drying — meaning you must manually remove, clean, and dry the mop pad yourself after each cycle. It is also not self-emptying, so the dustbin requires regular manual attention. The Roborock P20 Ultra, by contrast, covers all three mop lifecycle features — raising, cleaning, and drying — and adds self-emptying on top. In practical terms, the P20 Ultra is engineered for genuine hands-off operation: it handles its own dustbin, washes its mop pads, and dries them to prevent mildew, which the G10 Plus simply cannot do.

The clear winner in this group is the Roborock P20 Ultra. The shared feature parity on navigation is strong, but the P20 Ultra's fully automated maintenance loop — self-emptying, mop cleaning, and mop drying — represents a fundamentally higher level of autonomy. For users who want to minimize manual intervention, the G10 Plus falls meaningfully short here.

Several design fundamentals are shared here: both robots omit twin side brushes, include washable filters, automatically adjust their height for different floor surfaces, and have no onboard display. These are expected baseline qualities at this product tier and create no meaningful distinction between the two.

Dustbin capacity tells a more interesting story. The Roborock P20 Ultra carries a 0.77 l bin — more than twice the 0.3 l of the 3i G10 Plus. In isolation, a larger bin means fewer interruptions mid-clean, but this is somewhat contextual given that the P20 Ultra is self-emptying (as established in the features group). Where it becomes more relevant is the bag-based collection system: the P20 Ultra uses bags, which contain dust more hygienically during disposal and also trigger a full indicator alert — a convenience the G10 Plus lacks entirely. The G10 Plus is bagless, which saves on consumable costs but puts more responsibility on the user to manage emptying proactively.

On balance, the Roborock P20 Ultra holds the edge in this group. Its larger dustbin, full indicator, and bag-based system form a more complete and hygienic waste-management design — particularly relevant for allergy-conscious households. The G10 Plus's bagless approach is simpler and cheaper to maintain, but it offers less in terms of design sophistication for hands-off use.

Raw suction power is where the Roborock P20 Ultra pulls ahead most visibly in this group, rated at 22000 Pa versus the 3i G10 Plus's 18000 Pa — a gap of roughly 22%. In practical terms, higher Pascal ratings translate to stronger pickup on embedded debris, pet hair in carpet fibers, and fine particles on hard floors. Both robots clean all floor types and include an electrostatic filtration system, so the P20 Ultra's suction advantage applies consistently across surface types rather than in selective scenarios.

The G10 Plus counters with two notable differentiators. It offers 5 cleaning modes compared to the P20 Ultra's 4, giving users a marginally wider range of cleaning behaviors to tailor to specific situations. More meaningfully, it includes a dirt sensor — an active detection system that causes the robot to slow down and apply more passes in dirtier areas. The P20 Ultra lacks this entirely, meaning it cleans at a consistent intensity regardless of how soiled a particular zone actually is.

This group produces a genuine trade-off rather than a clean winner. The P20 Ultra holds the edge on brute suction power, which is the dominant factor for deep-clean performance. But the G10 Plus's dirt sensor adds intelligent, adaptive cleaning that can compensate somewhat for lower raw power — particularly in high-traffic zones. Users prioritizing maximum pickup force should lean toward the P20 Ultra; those who value smart, targeted cleaning efficiency may find the G10 Plus more compelling here.

At the battery and runtime level, these two robots are identical on paper: both pack a 5200 mAh cell and deliver 180 minutes of runtime per charge. Neither has a removable battery, and both include auto-off — so for coverage capacity and day-to-day endurance, users can expect the same experience from either machine.

The divergence comes in charging efficiency and power draw. The Roborock P20 Ultra recharges in 2.5 hours, meaningfully faster than the 3i G10 Plus's 4 hours — a 37% reduction in downtime. For households that run cleaning cycles frequently or need a quick turnaround between sessions, this is a practical advantage. The power consumption gap is equally notable: the P20 Ultra draws 50W during operation versus the G10 Plus's 75W, which is 33% less energy per session. Over weeks and months of regular use, this translates to a measurable difference in electricity costs and a lighter environmental footprint.

Given that runtime and battery capacity are equal, the Roborock P20 Ultra holds a clear edge in this group — it recovers from a dead battery significantly faster and consumes less energy doing the same job. The G10 Plus offers no compensating advantage in this category.