Should I get the Roborock S7 or Roomba j7+ for hard floors?

Get the [Roborock S](https://www.amazon.com/s?k=Roborock+S&tag=wehavethat-20)7. It has sonic mopping that vibrates 3,000 times per minute and actually scrubs, while the [Roomba j](https://www.amazon.com/s?k=Roomba+j&tag=wehavethat-20)7+ just drags a damp cloth. The S7 also uses LIDAR to map your floor quickly and avoids furniture without bumping. On hard floors, the Roborock cleans deeper and more efficiently.