Tile- a stiff plywood floor board below your tile is more necessary, and this is the method we even consider a 2nd ground floor across the plywood and below the tile. Some lean on the ground floor can fracture your tiles.
Hardwood- if the plywood flooring is lean, it will finish with rate and space. The ground floor has to carry the flooring pins, which plywood will be superior.
Laminate- these are like in facts of rate and space. Even if they will generally flow and not be decisive to the ground floor, you smoothly move and are powerful.
Carpet- trust its matting advantages from a robust plywood ground floor. Beyond that, your surface can also detect purchase even if exposed water flows properly. CDX contracts with this superior to OSB.