Steam vs. Suction: The Robot Vacuum War Escalated This Week

On October 12, the two companies that dominate your floors announced their next flagship robot vacuums within hours of each other, on opposite sides of the Yellow Sea. In South Korea, Roborock gave the global debut of the S10 MaxV Ultra Steam, a machine built around 110-degree steam and a dock that cleans itself. In China, Xiaomi unveiled the Mijia Robot Vacuum and Mop 7 Max, a machine built around raw power: 45,000 Pascals of suction, more than any of its predecessors.

The timing was not a coincidence so much as a symptom. The robot vacuum industry has split into two philosophies, and this week they went to war in public.

The steam church: Roborock's hygiene gamble

Roborock's bet is that the frontier is no longer suction, it is hygiene. The S10 MaxV Ultra Steam, launched first in South Korea, washes its mop in water heated to 100 degrees, then hits it with steam at 110 degrees to lift and remove dirt. After the cleaning run, hot air at 63 degrees dries the mop and the dust discharge path, and the dock washes itself with 100-degree water.

The mopping hardware is Vibrarise 5.0: 14 newtons of downward pressure combined with ultrasonic vibrations of up to 4,000 times per minute, plus an expandable mop head that reaches along walls and corners. Vacuum suction is 36,000 Pa, and an anti-tangle system is rated to handle hair up to 40 centimeters long.

Mobility got its own upgrades. The AdaptLift Chassis 3.0 can climb dual thresholds up to 8.8 centimeters, and the body is just 7.95 centimeters tall to slip under low furniture. Reactive AI 3.0, using triple structured light plus an RGB camera, recognizes more than 300 types of objects.

Roborock is selling hard in Korea: launch promotions on Naver and Kakao, a home-shopping event on CJ OnStyle on October 17, a Naver pop-up on the 19th, and GS Home Shopping on the 25th, with installation and pet-waste suction guarantees varying by channel.

The suction church: Xiaomi's horsepower play

Xiaomi's answer is power, and less of your money. The Mijia Robot Vacuum and Mop 7 Max reaches 45,000 Pa, up from 35,000 Pa on the 6 Max, and it sprays water heated to 50 degrees on its own when it detects a kitchen or bathroom. Xiaomi claims a 99.99 percent floor sterilization rate.

The recognition system is the other leap: more than 320 objects and dirt types identified, with the cleaning method adjusted to match the mess. Three robotic arms sweep and mop along walls, corners, and furniture bases, one of them reaching the edges the main roller misses. It crosses obstacles up to 6 centimeters, navigates under low furniture with a built-in 3D area array radar, and mops and scrapes simultaneously while collecting dirty water so the mop cloth stays clean.

Then there is the price. The water-tank version costs 4,999 yuan (about $747), and the slim version with top and bottom water supply costs 5,299 yuan (about $792). The 6 Max launched at 6,599 and 6,999 yuan. Xiaomi cut the price by roughly 1,600 to 1,700 yuan (about $240 to $254) while raising nearly every specification. For now it is China only, with no global release announced.

The industry has quietly split into two churches. One worships hygiene, the other worships horsepower. This week they held services on the same day.

Why the war is being fought in Korea

South Korea is the world's most demanding robot vacuum market, and its customs explain why. Shoes come off at the door and life happens on the floor, so hygiene standards for floor cleaning are higher than anywhere else. Domestic brands have surged past 50 percent of the Korean market on the back of that culture.

Samsung and LG are counterattacking with Korean living in mind. LG launched Roni in July, with 100-degree steam in both the robot and its station, plus a built-in design that slots into the kickboard space under a kitchen sink. Dreame answered in August with the Aqua20 Steam, a heated direct-injection steam roller aimed at the same floor-based lifestyle. Roborock choosing Korea for a global debut is unusual, and it is a statement of intent.

Globally, the Chinese brands are not exactly the underdog. They account for roughly 75 percent of global robot vacuum shipments, and analysts note their lead is increasingly built on AI and user experience rather than price alone. The Korean front is the one place the incumbents are holding the line.

The quiet third front: privacy

There is a subplot that matters more than the spec sheet. These machines roam your home with cameras and sensors, and Korean coverage this year has explicitly flagged consumer concern about personal information and video footage leaking after security issues emerged involving some Chinese-brand robot vacuums. Interest in the security systems of domestic brands has grown as a direct result.

Samsung leans on Knox Matrix and Knox Vault. LG built LG Shield, and designed Roni so the robot drives into its station and a door closes behind it, physically blocking the camera when it is not cleaning. Trust, not suction, may be the next premium differentiator, and it is the one specification that cannot be demonstrated in a launch video.

What it means for your floors

Step back and the pattern is clear: the flagship race has moved past the robot itself to everything around it. Steam for hygiene, self-washing docks, hot-air drying, stations that clean themselves. The product being sold is no longer a vacuum that needs you; it is a cleaning system that maintains itself.

For buyers, the practical advice is unchanged. Wait for independent reviews before importing a Korea-first or China-only launch, and pay attention to the ecosystem you are buying into: the app, the replacement parts, the warranty in your country. But the direction is set. A decade ago the robot vacuum was a dumb disc that bumped into walls. This week, in Seoul and Shenzhen, it became a small hygiene appliance with opinions about your kitchen floor.