California has that. The top 9% from each high school and the top 9% statewide are guaranteed UC admission. This does not guarantee admission to any specific campus, so if you are only interested in say Berkeley or UCLA you might get admitted but UC will find you a place at some campus.
Yes, I agree. The UC system is large and has many different campuses, but for undergraduate degrees it is by far Berkeley then LA. For grad schools, it is a toss up because different UCs specialise in different areas. Example: LA grad for film will be way better than Berkeley. And Berkeley physics or compsci will be much better than LA (but LA is still OK those). And don't forget there are some UCs that are grad schools only, like SF. They have excellent life sciences and medical school