In my opinion Stiverne is shot, he looks a shadow of his former self and his former self wasn't all that anyway. Takam slaps him silly.
Right now Takam easily. Prime for prime it's a close fight because Stiverne was a good counter puncher with pop and Takam has to fight close range. So prime for prime 50/50 current versions 100/0 Takam all day everyday
Stiverne has nothing on SHW's. But in this case he could bring his A-game against the equal sized Takam.
Takam weighs in at 250lb. He's not exactly small. He pounds out Stiverne. Takam is a quality fighter.
I also favor Takam. But if I were Stivernes manager I would rater fight guys like Takam instead of say Hughie Fury. Stiverne is short and slow on his feet. 6''1. 184 cm real height. But he can punch, and the right counter could seal the deal.