I'm looking to buy a 357 with a 3" barrel wheel gun. Seems my gun guy can't find any S&W's because they were a short run item. Yet when I talk to S&W they say they have a 686+ with a 3" barrel. Anyway... I'm also looking at the Ruger GP100 with the 3" barrel What's the differance and why is the Ruger less expensive? I'm leaning towards the Ruger.