Epicac raises a good point. Do you want to attend a school that has an actual campus or do you want one that's more fully intergrated with the surrounding business? St. John's has an actual campus, complete with the great lawn, parking lots, etc... all the things you'd expect on an actual campus. Not that you really have time to use much of them as a law student, but it is nice to be able to just take a walk and clear your head... or take your books outside and read over by the gardens and fountain.
On the flip side, St. John's is out in Eastern Queens. While there is plenty of bus transportation, parking during the day can sometimes be 'questionable' and you don't want to have to walk to the nearest subway station. IIRC, NYLS is in Manhattan, so public transportation should be a bit easier... but that's hardly a compelling reason to choose one school over another, especially when you consider the quality and reputation of the different schools.