A transfer from either a CC or a CSU is not easy for SLO. Priority is given to local CC applicants (Cuesta) but SLO takes few transfers overall so you need to see which works best for you. Is their any specific major or reason you want to transfer between the Cal Poly’s?
Use this link with the drop down menu to determine your specific major selection criteria for SLO:
http://admissions.calpoly.edu/applicants/transfer/criteria.html