Arreola wins in my opinion. I think he'll be too aggressive for Bermane. Stiverne's best chance in my opinion is an early KO. Arreola is arguably at the most beatable point of his career. I do like this fight, and think the winner of this is a worthy fight for a top 5 HW.
Arreola's the more proven commodity here. Unless he got shot overnight or Stiverne fights well above anything he's done in the past, Arreola will take it IMO.
Fatass that he is, Arreola has a very high entertainment value. I make sure not to miss his fights. Arreola wins this, he has much better fundamentals and plenty of heart/chin to go along with it. I predict Stiverne gets stopped in round 8.
I'll be rooting for Stiverne, but Arreola has the better workrate, chin and skill, and will probably knock Stiverne out