Good question; it all boils down to the doctor himself or herself. When I reviewed the bios of the docs, the ones in NYC seemed to have a bit more experience and involvement in oncology research, but that is just my subjective reading. And as for procedures themselves, no question the ones in NYC do more than in NJ - higher density of patients for one thing. When I went in to Sloan Kettering in NYC, there were more people in the waiting room than I ever remember at my urologist in NJ - by a large factor even on a per doc basis - virtually an assembly line lol. Again, I say this not to disparage the NJ docs - I like them a lot and for "routine" care I use them and am happy with them. But if I had a complex situation like cystectomy, then I would definitely use Sloan Kettering in NYC.
My two cents worth!