I asked the poster Tom Tocca about that (he's the guy Thomas Schlabe who works for BS, if you didn't already know), and he said it's all mind games essentially. Regardless, I think Ward and Dirrell are difficult for anyone to face in the Super Six, especially the European fighters.
I'm going with Peterson on this one, but I expect it to be a close fight. But I might be biased, I usually favor the boxer over the pressure fighter.
Peterson has nice advantages in height and reach, and I'm expecting him to employ them here. I just think Bradley squares himself up too much and leaves himself open to be countered too much. He showed some improvements in the Campbell fight, but that lasted three rounds, and he boxed more. I think he'll be back to his old self in this fight.
I just have a sneaking suspicion about Peterson in this one. I've watched the Holt fight a few more times, and think Holt had a fairly decent plan to beat Bradley, but didn't have the output or mental strength to deal with Bradley. I think Peterson might employ a similar gameplan.