I personally see no reason to go out and buy a .38 special gun just to shoot .38 special-level loads out of, especially if you already have a .357, unless you're just looking for an excuse to buy one. In that case, knock yourself out.
I currently have two .357's, a scandium snubby J frame, and a 3" model 60 with adjustable sights. The snubby is mostly for business, but I do enjoy the heck out of shooting the 3" model 60 using .38 special level loads. I had a 4" SP 101 too, but after I got the model 60, I decided the Ruger was heavier than what I needed and not as smooth as the Smith, so I sold it.
