In my case, FUE, the time the hair follicules were resting in recipeints before being put into my scalp was not that much.
If a surgeon is good enough to cause no damaga at all to gratfs while extracting them (which is more commom right now) then the yield is gonna be basically perfect.
Yet with FUT you can be the best surgeon in the world but it's inevitable the lost of grafts while using the blade to make the strip.