Boo, although I'm not sharing your opinion on a possible KO win / stoppage in favor of Bute, your post is good and true. Bute might be able to copy Dirrell's game plan. However, he's not as quick as Dirrell and can be hit. I've absolutely no doubt that AA could knock him out, if he's not disciplined enough or makes too many mistakes. 60:40 in favor of Bute.
The thing about Arthur is that he pretty much always has a chance. He's tough enough to weather some pretty serious storms, and under the right circumstaces he could stop anybody from 160-175. However, I think Bute is almost a computer print out of the wrong opponent; speed, mobility, power, et, and Arthur hates catching body shots!
Abraham will be doing an acting job and crying foul everytime he gets hit to the body... he no likey.. bute carves him apart in the center of the ring till his back is against the ropes and abraham knocks him around