Here is some readily available information on USC’s website: http://www.usc.edu/admission/undergraduate/transfer/prospective/transferbrochure.html
To be honest, I don’t quite understand the focus on attending a school in California, You have been admitted to a school that is well-respected, especially in engineering. USC and Penn State appear to be closely ranked for chemical engineering . My advise would be to enroll at Penn State with the expectation that you will stay there. You will get a great college experience at Penn State, which you would not get at a community college.