Terrible style matchup for Hill. His style is almost 100% boxing-centric, but Poatan is a much more technical striker and has dynamite in his hands. People might be swayed by the idea that Hill is naturally larger, but his style is to strike from distance--and against Poatan, he wouldn't have a length advantage.
Hill would obviously have a puncher's chance, but I'd expect him to get slept within 3 rounds. As Strickland found out, standing in boxing range against Poatan is a bad idea.