Pearson's a beast when he's not being an idiot and slugging bombs. His head movement when he actually remembers he can move his head is some of the best in the sport. Unfortunately he can be dragged into brawls quite easily when he does get hit. When he fights smart and tight, he's a hard man to beat and tough for anyone at 155. He's got pretty good TDD as well and a solid Judo base.
I think he wins this fairly handily.