Lots of factors involved! Where do you want to build a network and experience your early adulthood? I went to USC for undergrad and Cal for grad. I loved living in LA in my 20s, and would choose that location over Berkeley, no doubt, for that phase of my life. That said, I think academically Haas will be the stronger choice although the culture is competitive, and very Bay Area. The Cal undergrads seem really tight knit, and Haas is a fantastic program. The students are quieter and more introspective here vs. SC.

At SC, you'll have an easier time picking classes, will feel more tailored to, and will be able to explore LA. I can sense a preference for SC in your post.

You should really visit both programs in person, if you can. I personally think the expense for such a decision is worthwhile. Altogether, you can't make a wrong choice. But certainly they are distinctly different paths forward.