I actually didnt think this was subjective at all lol. high sensitivity is better . unless im thinking dpi/sensitivity are different?
I always start with low sensitivity as im learning, but then i raise the sensitivity as much as i can. Players that can handle the higher sensitivity have the edge for what okcnaline said. someone maxed can do a full 360 by moving the mouse .5 inches in lets say .1 seconds. a player set lower may need a full inch and .2 seconds to complete the full turn.