Commuting to school and going to Cal are complete ends of the college spectrum. One is more like a job than college (commuting). I am going against grain and think the idea of the college experience at Cal is worth the difference which is 25K between that and CSF.
I will say however, if the coach is a good mentor/person at CSF that could be a good influence on your son. Last question, at Cal, would he be on the track team in his one sport, just without a scholarship? Meaning, would he get athlete perks?