I prefer the .38 for its milder characteristics. However, there is no doubt that the .357 has more energy. The question is, is it worth it out of a snub pocket gun?
That is the real question and one that each person must answer. For me the answer is a resounding YES, however, I preface it with a steel gun. The ScTi 357 J frame is the most miserable gun I have ever fired and was still worth it to me in moderation, except the gun would not take it.