Both are quality programs. I don't know much about the strengths of these depts in your field, but I know enough to advise you to ignore the rankings (to a point--both are top 30, so I wouldn't worry too much). I hear both are shark tanks. UCLA's dept is the largest in the country, so you're less likely to receive a lot of individual attention. I hear NYU's faculty is pretty divided. Keep in mind this information is based largely on hearsay--I have no direct experience with either dept.