This is a little late, and I'm a proud Tepper alum, but you should go with MIT. That 10-15 spot difference in MBA rankings can make a suprisingly huge (and possibly unfair) difference in job opportunities, especially when it comes to MBB.
I know someone in this year's class and they actually said that 7 students got McKinsey offers this past year, so any claim that you'll never see one of their recruiters at Tepper is patently false. They obviously recruit on campus there. However, that still pales in comparison to the offers McKinsey gives out at Sloan. Bain may recruit one kid a year at Tepper, that's it, and BCG doesn't go there at all. The only kid who got an offer there from my year got it through connections.
The average starting consulting salary at Tepper is 115k vs 125k at Sloan. Not a huge difference, but noticeable nonetheless.
Plus, good luck getting a west coast location in consulting from tepper. The kids I know who got McKinsey offers are in Detroit and Pittsburgh, not exactly prime desinations.
It's not like going to Tepper for consulting with 70k in scholarships is a bad thing. The 115k starting salary and 25% consulting placements speak for themselves. You could take the money, go to Tepper, and easily get a consulting gig. But because you want to go the MBB route and work out west, Sloan's your best bet.