The G20 will carry easier, most likely. Flatter, likely not as many sharp edges. And I'll go out on a limg and say the G20 will take more abuse.
Depending on what variety of .357 you have.......the G20 may be more compact and lighter.
A trail revolver needs a compact grip, sturdy fixed sights, few sharp edges.
Adjustable sights are prone to get goobered, and the big N-frame and SA revolvers can be very heavy.
My 629 Mtn got retired as a woods pistol, as did my Ruger B-hawk, by my G20. Easier to carry, and over twice as much ammo w/o need for a reloading device.