Question is are you willing to change DPI in windows ? cuz to me I'd always have to have osu on 1x, so desktop and osu are same mouse speed, else it would be weird af
If you keep losing circles because it takes too much effort to move ur mouse and you slip your grip, it's obv bad, likely too low sensitivity.
If it's high it's less effort, less slipping, but u gotta be comfortable with it (in windows too, or any 2d game).
I myself have ultra high sens (4000), it's a bit straining cuz i make small movements and my cursor moves a lot, idk how lowsens is. I can't tell if my aim is bad compared to if i had lowsens, maybe if i had lowsens i'd be aim god.
It's best to find a middle ground