I imagine Tarver could beat Arreola the same way Adamek did. Basically with movement to frustrate and tire him. I don't know why we don't see more fights between all of the non-giant, top heavy weights. Adamek, Haye, Arreola, Chambers, etc. Seems like these would be some entertaining and competitive fights. Instead they all just want to fight the Klit bros. All about the bucks.
This actually sounds like an interesting match-up. It's one that I never thought about, but now that you mention it, hell, bring it on.
The Nightmare, too big, too strong, and Tarver doesn't bring the speed to the table that you may think would give him some advantage.
Tarver might just last the 12 rounds but he doesn't have a hope of winning it. Arreola by 6th round TKO.