I feel very much the same way right now. It seems like the RCA program will be much less hand-holding. You'll have to be VERY independent from what I've gathered. So, if that's how you like to work, than that might be a good choice. Also note that the RCA as a school is not the greatest at helping you figure out any sort of outside resources and opportunities. The classmates and alumni you meet will be your support network for life, but the school itself... not so much. (again, this is just what I've inferred, might not be true)
With NYU... well you get the whole NYU backing you up. Lots of industry connections, lots of entrepreneurial resources and opportunities (Leslie E Lab & the NYC Media Lab). In my opinion though, they're a little too focused on what's cool at this moment, rather than critical thinking and shaping the inventions of the future. And hey, it's there in their "title" - the center for the recently possible, not the center of the future.
The class size at NYU is a lot larger (I think 140 VS 49 at RCA).
I think if you're looking for skills and want a structured curriculum backing you up, NYU is the way to go. The network you'll make at both, I think, is comparable (:, they're probably as many international people (if not more, due to its size) at ITP/NYU than there are at RCA, so I wouldn't really worry about that.
If you're looking for... uncertainty, but you know that you have enough self-discipline to follow through and really push and challenge yourself to think and create "outside the box" (I know that sounds so cliche, sorry :D), then you should consider RCA.
Those are my thoughts. I, myself, am still undecided... but hey, 10 more days to go