Which university is part of a system that has fewer campuses, University of Colorado or University of California, Los Angeles?
University of Colorado: The University of Colorado system is a system of public universities in Colorado consisting of four campuses: University of Colorado Boulder, University of Colorado Colorado Springs, University of Colorado Denver in downtown Denver and at the Anschutz Medical Campus in Aurora. University of California, Los Angeles:  It became the Southern Branch of the University of California in 1919, making it the second-oldest undergraduate campus of the ten-campus University of California system.
University of Colorado