Columbia SIPA vs. Johns Hopkins SAIS

I've been accepted into Columbia SIPA and Johns Hopkins SAIS and would like to get opinions on which would be strategically beneficial to me. I have no background in finance but would like to make a career out of it. I do not have much experience (Peace Corps) and my major was in a different field. I grew interested in microfinance and microcredit as a Peace Corps Volunteer and want to transition to investment banking for the developing world. I realize I don't know much but that's the general idea. I know most people would say to get an MBA, but these programs do have decent employment outcomes (even if they are lowly analyst positions). If I do strive for the MBA, I would be shooting for the top 50 programs most likely.