A:Answer Dear Helen,
Thank you for your question. As long as it's non-carpeted floor including vinyl, tile, laminate, and sealed wood floors, you will have no problems using this machine. As for the differences, S5 Extreme has a "suction only" mode to deal with wet surfaces, and comes with an extra brush roller compared to S5.
Hope my answer helps. Have a nice day!
Best,
Tineco Customer Care