I got into Cal Poly Pomona for Business Admin and UCR for Sociology Admin but I’m not sure which college to pick or how they compare (academically and college-life wise) .
Both are pretty well-known schools - there are probably better experts here that can tell you all about the benefits of the UC system, so I’m not going to try to do that. If you tell us what your plans are, such as whether you consider going to grad school for a specific subject, UCR obviously has a wide range of graduate programs while Cal Poly Pomona has fewer.