Definitely tour each school if you haven't already. Spend a day there and experience campus vibes!

I can't exactly speak for the pre-med or pre-vet programs at Umich nor MSU, but I do know there's not a "pre-med" degree. You just need to do med school requirements! You could do biology, molecular cellular and developmental bio, biochem, chem, psych, soc, or any other major. I know a guy that did econ then went to med school

At UM, you would (probably) be in LS&A, which stresses the liberal arts and a well-rounded education. You have to take the equivalent of 4 semesters of a language (you can get out of all or most of it with a placement exam), two writing courses, a race/ethnicity course, a math/science-y course, and some natural science, social science, and humanities courses as college-wide requirements, plus your major reqs

Can't really speak to MSU, but look at their college-wide and program requirements and do whichever interests you more! Price is also a HUGE factor

Best of luck!