Hey! Congrats on getting into NYU! thats an amazing program! Eeek what a predicament! I envy you, but also not at the same time LOL 😜 Its hard to put myself in your situation, also because I don't know much else about your life and environment. If I were to put myself if your position, CU is my first choice, I would hold off. But, there is also a reason you applied to NYU and if those similarities align with CU, I would take NYU in high consideration (also since they have already accepted you). Both are great programs/schools, highly competitive, and will get you to where you need to be in a year or so!
Congratulations again! You have a tough decision to make!