There is definitely a difference in the style of bats. BBCOR has a much smaller "sweet spot" than the good ol' Stealths from Easton (my personal favorite bat) that you could hear a mile away, or any other bat since. I remember playing travel ball at PRP in Louisville one year and I jammed the hell out the guy (BIG guy) and he somehow still hit the dang ball 375 for a homer? I learn a little bit about pitching that day lol. But basically the BBCOR bats reduce the trampoline effect off the bat, so it comes off slower. Much more like a wood bat, and I'm sure the scouts love it because it gives them a better idea off how a prospect will perform when they switch to wood. I think the main reasoning for the switch was for the safety of the players though. Even a few tenths of a second can save a pitcher's life on a line drive back at him.