What often separates the HS from the college refs is no more desire to work that level and the time to devote to travelling long distances to officiate a college game. Oh yeah and ego........maybe a little flair and bravado, maybe better communication with the coaches and players....maybe good
PR skills......my opinion is based on having met and spoken to some D1 and D2 officials. I work high school because I don't have the time to devote to college yet. But that may change.