I see. Yes, the only real difference appears to be the baseplate form and gasket type. I have yet to see a PGI made filter that looks poorly made. They all are superb.The Service Champ photos you posted look to have the same built configuration (and probably quality) as the CQP, MicroGard Select and Premium Guard. The size of the filters for the same engine application may be driven by the brand owner being specified to PGI.