I wanted a .357 six shot revolver with a shorter barrel for PPC Service Pistol matches. I was using Semis and am older, and chasing brass around the range is loosing it's appeal fast. I approached this with an open mind. The three most common were S&W, Ruger and Alpha Proj. I was fortunate to handle all three, and ruled out Alpha Proj very quickly; fit and finish was not as good; and the trigger was not even close to being in the same league. It did feel nice in the hand.
As others have written, there was very little difference in the triggers on either the S & W or the Ruger GP. Both the ones I handled had the rubber grips, and both felt good in the hand. I had no preference, and my hunt to find a good used one of either was on. I lucked out, and found a new in the box Ruger GP100, blued in 4.2 barrel, that had been used as a dealer's counter sample, and had never been fired (unless Ruger proofs them at the factory). It had the slight drag mark on the cylinder and that was it. I lucked out and got it for $600+Shipping. No regrets!! After 1000+ rounds of light .38 special, the double action trigger is like silk; the single action remains crisp and clean.
I have no doubt that I would have enjoyed a S & W just as much, but like Ganderite above says, it is more robust (no side plates that weaken the frame, more secure lock-up of the cylinder, and IMO, more ergonomic cylinder release. Not only is it easy to change the front sight, but they are relatively easy to completely strip fro cleaning:
There is no question that the S & W is a great design; there is no question in my mind that the Ruger GP100 is a superior design.
How does it shoot? I'm a pretty good shot with my 1911, my Jericho .40 and my Nork NZ85; I shoot better groups with the revolver double action than I can with any of those other three. The recoil is different, without the slide slamming back and forth; maybe that is it? Who knows, I know I like it and it's a keeper.
I did find some interference with the factory supplied rubber grip and my Safariland speed loaders. I was able to reduce top left side of the grip a bit with a small scotch-brite pad in a die grinder, but it still not great. I was able to get a set of older grips that were new take offs with the rosewood panels; much more room! Those grips move my grip higher on the revolver, and I believe that will further reduce felt recoil. I'm waiting for my range to reopen so I can try out the speed loaders and new grips in "real world" conditions.