Myles hands down. If you ever check out AB's live concerts Myles can belt out a good one that'll make say HOLY ----!
Did you ever see the movie Rockstar?
http://www.youtube.com/watch?v=7xgfEb_lUGg
Did you ever see a live cover of Kashmir? And it was rumored that Myles had a cold. Bow down my friend and give respect where respect is due.
http://www.youtube.com/watch?v=fPNnBisii1M
PS - This doesn't belong in the Creed section as the two singers have nothing to do with Creed.