Both are excellent schools but extremely expensive OOS and hard to get into. Not sure its worth it bc there will probably be hassles along the way that your $ isn't going towards. But for independent students willing to problem solve there is a lot to love.
Agree with above posters, its not so much pro/con but the schools are different.
Academics:
https://www.niche.com/colleges/university-of-california-berkeley/majors/
https://www.niche.com/colleges/university-of-california-los-angeles/majors/
Its probably not completely accurate but it does give you a sense of each. Berkeley has a great Business school, UCLA doesn't offer that major. Berkeley has a lot of kids majoring in Comp Sci/EECS and now Data Science
https://news.berkeley.edu/2023/05/18/uc-regents-vote-creates-uc-berkeleys-first-college-in-50-years
UCLA has the edge in humanities and communication/arts programs. Berkeley is stronger in Environmental Studies.
Finally UCLA is quarters, Berkeley semester system
Lifestyle
The schools are very different. UCLA is socal and sunny most of the year but there will be rain and slight cold during winter. Berkeley is chilly, foggy, sunny and windy all in the same day. You will be constantly taking off/putting on layers.
Housing - Berkeley housing is a well documented pain - just google it. UCLA much better.
Both have decent greek systems but you can also easily ignore greek life.
College sports - UCLA much better for football/basketball. Both have strong other sports.