Robot vacuums have evolved from simple floor cleaners to smart devices that map homes, avoid obstacles, and even self-clean.
The LG RONi and Roborock S9 MaxV Ultra represent two different philosophies in premium robot vacuum design.
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LG RONi focuses on hygiene with its 100°C steam cleaning system, while Roborock S9 MaxV Ultra emphasizes raw suction power and advanced navigation.
Your choice depends on whether you prioritize deep mopping or all-around performance.
Design and Dock Differences
The LG RONi offers two station options: a Hidden Station that fits under a kitchen sink (15cm tall) and an Objet Station resembling a side table.
Both feature a front door that closes to conceal the robot and its camera, earning Privacy by Design certification.
In contrast, the Roborock S9 MaxV Ultra's RockDock Ultra sits openly in the room. It handles dustbin emptying, mop washing, and drying automatically.
The robot measures 350 x 353 x 79.8mm, and the dock can connect to water and drainage systems.
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Cleaning Performance and Navigation
The LG RONi has 30W suction, spinning mop pads at 180rpm, and a side brush extending 46mm.
Its standout feature is the first-ever 100°C steam cleaning, which eliminates 99.99% of four bacteria types from mop pads and station.
Roborock S9 MaxV Ultra offers up to 22,000Pa suction, double its predecessor.
Its VibraRise 4.0 mopping vibrates 4,000 times per minute and uses 80°C hot water to wash the mop.
It lifts the brush 18mm on carpets and climbs thresholds up to 4cm.
For navigation, LG RONi uses eight sensors and recognizes over 120 object types, including cables and pet waste.
It can notify you via the LG ThinQ app and adjust cleaning settings per room.
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Roborock uses Reactive AI 3.0 with LiDAR, identifying 108 objects, and offers pet monitoring via Pet Snap and Video Cruise.
Price and availability differ significantly.
LG RONi launched in South Korea at 2.19 million won (~$1,420) for both versions, with no confirmed global release.
Roborock S9 MaxV Ultra is available in the US at $1,799.99 and in other markets, costing around 1.41 million won in South Korea.
Choose the LG RONi if you value a hidden design and steam-based hygiene over maximum suction.
Opt for the Roborock S9 MaxV Ultra if you want powerful suction, advanced navigation, and pet-friendly features.
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Both robots excel in their own ways, so the best pick aligns with your cleaning priorities.
