Compared to the Kimber Gold Match, the Colt is a little less ammo sensitive, and a little less accurate. Also, the stories about the rear sight pins breaking on the gold cup are true. My GC has a Millett rear sight, aftermarket thumb safety, aftermarket slide stop, and aftermarket grips. Now it's one of my favorites.
The '80 Series, which I have, are less popular and can sometimes be found at very good prices.