I would go wherever you feel comfortable. The BC students will say that BC profs are better, which I actually agree with, while the BU students will say their profs are better. Yale and Harvard do the same thing. Its stupid. I would just go wherever you feel the most comfortable. I would probably go with BC though; I don't think BU has really created as good a reputation as BC as of yet, but it may in the next five or so years.