RGB 15 pin or RGB component

My new HDTV and HD satalite receiver have the option of being connected by two types of RGB inputs. A 15 pin cable (separate from the DVI connection) or a 3 cable component video connection. Can you explain the difference between these connections and which one will look better veiwing HDTV.Sat Rec Samsung SIRTS360.TV Pioneer PDP433CMX
The three cable component is NOT RGB, I believe. The two flavors are RGB are usually the 15pin d-sub connector or 5 BNC connectors. You find both on high-end computer monitors, for example. The component you cite sounds like a Y, Pr, Pb connection - not RGB. Although I guess it could be RGB with the H and V cables for separate Horizontal and Vertical sync.