Transfering Mathematics Major. UCLA vs UCSD

Hello all! I got accepted to both UCLA and UCSD( Warren) for Mathematic major. Right now, i’m still thinking which University will best fit for me. I know that both schools do have a good Math progam(major). I just wondering which school is more comvinced to me that I can maintain my high GPA after 2 years. Since I’m planning apply to the PHD program in the future. I need to maintain my GPA in a good position. Any opinons about both UC Math classes and also the curve system( grade in class)!! Is it really competitive at UCLA?