I've owned a few Detective Specials and like them a lot. I'm looking at the airweight versions. I see them pop up on the sites and in stores. I'm trying to see the real difference between the Agent and Cobra. The Agent is described as a Cobra with a shorter grip frame-but the newer Cobra has a short butt just like the Detective Special So is there any real difference? If one is considered better made by the Colt experts here I'd like to know before buying one.