I don't think there should be [i]much[/i] difference between the Exo, Awakened, and regular old Human, mind you. However I believe some small specialization such as a unique ability perhaps would greatly improve the diversity of characters. With just cosmetic difference, I don't really see the point of multiple races at all. Why not just modify your human's appearance to have grey skin or cybernetic features? Also since it appears, for the most part, individuals are incased in armor the majority of the time, these racial differences will go completely unnoticed and unappreciated during the bulk of game play. So cosmetic only differences in the races will not even be cosmetically visual. It seems to me to be a waste of a further opportunity to make your Guardian your own by merely sticking with differences in appearance among the races others will see rarely if at all.