I think you should pick the school that has an environment where you can succeed. I know NYU has a large class size, if you like smaller classes, maybe the other school is better.
It also helps if you have a good external environment. If you think living in new york city will be good place for you, then NYU might be a good option.
In addition, Ive heard certain schools design the cirriculum so that you can do well on the boards.