Which school is more challenging academically?

I got accepted to both Ohio State University and Michigan State University. I also got accepted into Indiana University and Penn State University, both of which I would probably have gone to, but I live in Illinois and therefore cannot afford paying so much money for out of state for my bachelor's degree. I want to go into Atmospheric Science/Meteorology, both of which OSU and MSU don't have exact programs, but can kind of wiggle their way into the program vaguely. Which school should I attend? I'm completely split, and I love both schools. I'm from Chicago, so MSU is an Amtrak ride away...however, I loved the urban feel of Columbus. But again, I love MSU for it's large campus and how many trees there are. Of course I'm not looking for anyone to make the decision for me on which school I should go, but some opinions would be nice to hear.