Carolina plays the same up tempo pace BYU does...but with much better athletes, much better defense, better bigs (who would destroy BYU's bigs), and better depth. Carolina has better shooters, better ball movement, more creative guys on offense, and the length to absolutely shut Haws down. Tokito, Bryce Johnson and Justin Jackson would have a hay day on the wings because BYU doesn't have bodies that can match their size or speed. BYU also doesn't have an answer to the inside game of Meeks, James, or Hicks who can all go to the hoop or play with their backs to it...think Sabonis or Waldo with athleticism (or think Bronson with a lot of polish...x3)
I'd pick Carolina to win by 20 in a game that wasn't close. That would be a rough draw for BYU.