Personally I would say MIT. I want to go into something where the brand name would be a lot stronger. I like the location a lot more (Boston vs NY) for a lot of reasons: cost of living, family and friends, Red Sox, Cambridge vs Harlem. I think if I wanted finance and to work in NY post grad I would go with Columbia. But since I want GM in a field where engineers dominate a lot of the ranks MIT just has a much better sound to people like that.
Sloan is a pretty small school and if you told people you got an MBA from
Sloan few people outside of areas where MBAs are common would have a clue. Tell people you went to MIT and everyone will ask what kind of engineering degree you got. Tell people you went to Columbia Business School and that immediately has a draw to it.
If you want something in IB or MC they are pretty much on Par though...hope one gives you money and makes the decision for you.