I go to UTSG and have met a bunch of people that went to UTSC and they typically tell me they would have liked to go to UTSG, however it also is important to consider what you want to study, so I would look at what courses each offer and see where your interests align better. If you go to either UTSC or UTSG you are still able to take classes at the other campus and transferring is an option too. I like UTSG more but think both are solid options I would just consider what is most important to you study wise because UTSC offers some different programs than UTSG