I thought I would bump this post to add some questions I read somewhere else. These, for the most part, seemed like decent general questions. They're targeted at an alum who is living abroad, but some of them could be tweaked for student/adcom/domestic use.
If you can't make a visit, then ask each school's admissions office
to put you in touch with an alumnus or alumna from that school who
lives in your country, and get in touch with him/her (preferably not
a person with whom you interviewed so that you can get a different
perspective or two). Good questions might be something like:
For what is your school well-known (finance/marketing/etc.)?
What do you think are your school's strengths?
If you could change anything about your school, what would it be?
How is an MBA from your school perceived in this country, and how does it compare in prestige and pportunity with an MBA from either of the other two schools I'm considering?
Do you still keep in touch with classmates from your school?
Do you still keep in touch with any faculty from your school?
What opportunities did your school open up to you?
How helpful/effective is your school's career/placement assistance department?
What part of your MBA did you find the most fun / challenging / eye-opening / etc.?
If you were to consider business schools now, to which of these three schools would you apply and why?
These are just a few, and there are many more that will depend, again, on your own interests.