UCL vs CMC vs UCLA

Hi, I am an international student. And as the title suggests I got into those 3 colleges and I am finding it hard to chose which one of them to attend.
I am majoring in economics but in the case of UCLA, I am double majoring in math and econ.
I currently don’t know what I exactly wanna do with my life but I am considering working in IB/consulting ( finance in general) or getting a Ph.D. and working in academia.
Please say your opinions on the unis and their respective job/grad school prospectus and why you think one is more superior than the others. Thanks in advance