I liked both a lot. They're both PBL so they're similar in that regard. But I think I like Case's curriculum a bit more because they're blocked and have the optional USMLE style tests to do after their essay tests or whatever. With that being said though, I probably would have picked Northwestern, I felt like I'd be happier there, though this may have been largely affected by Chicago>Cleveland. I think reputation-wise, here in Canada, educated people would have heard of Northwestern but fewer people would have heard of Case, if that's what you're into. But you can't really go wrong either way, as said above.