i went to a course once that had a 2 striped range ball and wow was there a huge diference, it felt very clunky and you could tell it was a 2 striper. i have heard there are 3 strippers out there. but other than that one range i have played 1 strippers everywhere i go. i am sure there is a diference, but i don't notice it. every now and then you find a real ball that they probly got from the course someone lost or somhow becuase out or 40 balls i usually get at least 1 real midranged ball like a titelist or a callaway, but i never saw a high end ball. i don't really notice a difference to be honest, maybe if they had a green i don't think it would spin back as much then a real ball, but maybe 5-10% difference sounds good.