Between surplus and commercial .357 Magnum? Yes, there's a difference. Between commercial 7.62x25 and plain vanilla .38 Specials? A bit, but no different than 9mm vs .45acp. Reloaded .38 specials blast it out of the water in regards to cost. Nevermind that you could ethically whack a deer with a .357 Mag, a 86gr SP in 7.62x25 isn't going to come close.