What is the difference in cost? Which is more affordable? That’s something to think about, especially if you’re going to Med School.
You need to think about which school is a better fit. Would you rather be in scenic Ann Arbor or San Diego? San Diego is a bit smaller. Consider that too. Both have similar social scenes. Michigan has a better rep, if you take advantage of opportunities at UCSD you can be just as successful. Additionally, Michigan has a bigger sports scene if you want that.
However, the difference in med school acceptance rates are huge. That is something to consider. But, if you think UCSD is a better fit and works out better financially, I would give more consideration to UCSD.
Personally, I like Michigan better but only if they are equal in costs.