Smart money would be on Spence Jr. But Porter can make the fight ugly, and to his advantage if he can get in and smother some of ES's offense.
I just dont see it. I think Spence does fine against him. I'll be somewhat surprised if Spence doesnt have Porter retreating by the end of the fight.
Porter's style is designed to give hell. The only way to slow his aggression down is to hurt him and back him off. It's not easy to do, but doable nonetheless.
Porter is tailor made for Spence. A cavemen who comes forward and can't box... He was getting backed up by Granados, what will Spence do to him? It will go similar to Peterson bout except Porter will last a bit longer.