Scandium S&w 38/357 J Frame,
.38 Specials - Mild rear recoil with modest upward bias. forearm moves back and up maybe 15 degrees. No "sharpness" or particularly strange torque.
2nd shot realignment is fast for targets within 25 feet. You can easily shoot 35 rounds before you find yourself pausing.
.357 Magnums - Strong rear recoil with strong upward bias. Wrist may slightly "break" prior to the full arm moving up, forarm maybe 25 degrees, full arm say 15 degrees. Sharp snap and some rotation torque. 2nd shot is moderate for targets within 25 feet. After 5 rounds you will want to pause.
Great, reliable gun for concealed carry. Weighs nothing. With a laser grip may very well be one of the most extraordinary carry guns ever offered outside of a custom gun shop.
Having said that, if you are looking for recreational shooting, I would say .357 are unpleasant to shoot in this frame/barrel. If you believe you must train ALOT and carry the loads you train ALOT with, I believe you will be carrying a .38 Scandium.
Hope this helps, many may feel very differently.