If I were you I would pick UCLA simply because if you end up liking a different side of applied math, you can find a different career. Majoring in actuarial science is pretty narrow. I applied with the goal of becoming an actuary, but I applied as a Statistics major to allow for a more open ended career, because an actuarial career is based on the actuary exams, as i’m sure you know. My vote goes to UCLA, but go check out both and see which you fit in better.