2019 Recruiting List Transfer credit is well defined coming from a JC, the more academic programs have a numbering system that maps to UC equivalents. There are a lot of classes for which one would get credit transferable to a state college but none to a UC. Conversely, there is no list that says these CSU courses map to these UC they would be evaluated individually.
There are entire majors at state colleges that have no uc equivalents. Not necessarily a bad thing but not equivalent so no credit. Or even if they got credit might not fulfill major prerequisites.