Look to see if the majors are impacted at the UC schools. Sometimes it is hard to get classes.
A benefit of Umass is the consortium. Engineering students don’t have a lot of time to take electives, but if she found the time there are a lot of courses offered at the other schools that might interest her.
I’ve lived in Mass and California. I’d take California, especially if she wants to end up in California. You can go to any school and get a job, but it is easier to get one near your home. Easier to interview, easier to move after school.