Note that CSUs tend to have larger numbers of general education requirements than UCs:
CPSLO: http://ge.calpoly.edu/content/ge-requirements-and-courses (72 quarter units, or about 18 courses)
UCI: http://catalogue.uci.edu/informationforadmittedstudents/requirementsforabachelorsdegree/ (13 courses, or about 52 quarter units)
The greater number of general education requirements may slow down the speed at which students in the same major can graduate, since a student in a high unit major may need to take overloads (more than 15 units per quarter) to complete all subject requirements for both the major and the general education requirements in 12 quarters (= 4 academic years).