For UCB, CS can be done as either EECS in the CoE, or L&S CS in L&S. EECS is direct admit to major, but more competitive for admission. L&S admits undeclared only; students need a 3.3 GPA in three CS courses to get into the L&S CS major. About half of the students in those three CS courses earn B+ or higher grades.
For UCLA, CS is only in the CoE. Those who enroll not directly admitted to the CS major will find it very difficult to get into the CS major there.