Dirrell is very talented, tremendously talented. He's more talented than Bute. But, until proven otherwise, to me he's mentally weak. And, a mentally weak fighter won't be able to beat Bute. I don't know why people think Bute is a bad fighter. He really is not bad, he's a damn good fighter.
There are only 2 guys in the SMW division who I can see beating Bute at 168...Ward and Froch perhaps.