I wouldn't normally say this. But if I was considering those two bikes I would pick the Giant solely because it looks 400% better in my opinion. The components are a wash, the frames are both very nice. I'd be suprised if you were dissapointed with either. So long as one of the Giant sizes fits you, you will look much better riding on that one. The Trek is some sort of silver/black/brown color that is just plain ugly!