I like PBL and I also am headed toward primary care so MSU is good for me. It is true though, if you want to do some kind of sweet specialty, Wayne may be the better choice. I guess is becomes hard for you because you haven't even started UG yet so you probably don't know what you want to go into. Do you?
Also, for the program that you're going in to, did you interveiw for it. If not, maybe you should go take a look around both schools, especially the medical schools, if you haven't done so already. I was torn between these two but what really drove home the decision to go to MSU was the gut feeling I had when I was at the interview day.