A:Answer The KSMFGA is a newer product that mounts other KSM— attachments. The older FGA only mounts older non-KSM attachments. The overall design is roughly the same, but the KSMFGA's collar has five fins, while the FGA's collar has ten ribs and uses a wrench. The KSMFGA has a slightly larger port, so its attachments do not fit into the smaller FGA.