Bute hasn't really been tested against quality opposition - he's done well against who he's been in there with but his issues with Andrade and such, I dunno. We've seen Kessler come through wars (Froch) and we've seen him beat talented speed fighters (Mundine) and we saw him match Calzaghe until Calzaghe went up another gear, a gear Bute potentially doesn't have. It's not beyond reasonable suspicion that Bute loses to him.