Chisora didn't look great against Fury but against Stiverne he won't have a gaint he will have to chase to get into range. Stiverne isn't very mobile, Chisora will be able to cut the ring off and get off without to much difficulty. Chisora has far better head movement than Arreola, so he won't get caught half as easily as Arreola did. I could see Chisora winning by outworking Stiverne if it goes to the scorecards. But the problem Chisora has is he doesn't have anything to hurt Stiverne with. He isn't a big puncher and Stiverne has showed against Arreola and Stiverne that he is pretty tough and can take shots from big punchers. Stiverne likes to counter and he'll have the opportunity do so against Chisora even with all of Chisora's head movement. I suspect Stiverne will catch him with a big shot now and again and hurt Chisora and eventually he will grind him down and force a stoppage while behind on points.
Chisora would win every single round for as long as it lasts. However, he doesn't have the power to stop Stiverne. Helenius, Klitschko & Fury (1st time) couldn't stop Del Boy or drop him and I'm not sure Stiverne can. I think his KO of Arreola in the 2nd fight flattered him. Chisora PTS.