You’ve said that your SAT score is a 1575, which is impossible to get. It’s making me question the credulity of this post…
Anyways, you have a lot of ECs, but it almost seems like they’re to the point where your just doing them for your resume. But since your test scores are so high, I’m sure you’ll get into quite a few of your schools. I’d actually say you’re more likely to get into Columbia than Brown since Brown is so funky in who it admits (usually quirky, “unique” teens). Good luck!