I agree with
@danieldrummond. Most of that additional 35,000 (at USC) is housing/cost of living expenses. If your full ride at NYU covers the insane NYC housing prices and cost of living, then I would seriously consider the cost factor in your decision on which SCHOOL to choose.
However, becoming a TV SITCOM writer is a goal you may want to consider by taking the financial aspect off the table for a moment (especially since international students have additional visa stakes to worry about) - btw, I made my decision to accept the massive debt on top of my current debt based on the opportunity.
The TV industry is in LA, so the opportunities to network, intern, and take meetings are way more convenient - as you already know. Both schools are prestigious, but you may save time by developing your network in LA and pursuing jobs and assistant gigs during your MFA program. No one says you must finish the program to become a professional writer. There have been some who have left the 2-yr MFA when the "right" opportunity (money upfront) came along, and the founder of USC's MFA program told me last week that these students were always the proactive ones who started the program with a lot of momentum towards their careers.
A fellow USC MFA candidate this year is Colombian, so he's making every effort to get representation and expedite the job hunt in order to get his visa. This isn't to say that you can't do comedy in New York. SNL and HBO are out there, so if you want to do sketch or indie comedy-dramas, you could definitely find success and gain attention from producers and representation. But traditional, multi-cam, network gigs tend to reside in LA.
I say this as someone who also favored Columbia University and New York before the film school gods doled out my fate. The opportunities and location associated with USC ended up superseding initial costs and opened up the possibility of TV, when I was traditionally focused on feature. Hopefully this helps give you perspective. Either way, you're in a good position to choose and it seems like your work is respected already. Good luck with your decision!