User blog comment:Kogath/Monster Hunter Generations Discussion/@comment-28908045-20160806121521/@comment-26421638-20160806142333

D) On your guild card/hunter's note, The Number of Variants Hunted is shared with their standard counterpart, while Deviants have their own separate sizes, description and hunt counter

E) Deviant's Equipments have some unique traits like the "Soul of (Deviant)" armor skill that can be unlocked if the armor pieces are upgraded at a specific level (6?, i guess...) or The Weapons that fills the hunter arts faster

I'm sure that there are other differences that ATM i cannot remeber...