I have asked many Mormon missionaries and other Mormons exactly what sin Joseph Smith committed. They have been unable to name a single one! Surely he lied, stole, coveted, disobeyed his parents, and lusted, or some of those, at the very least, as they seem to be the most common misdeeds, I mean sins. There are Mormon factions that do acknowledge that he committed certain sins. These churches tend to believe he is a “fallen prophet.”
Nor do I recall anyone in the Mormon church having been able to tell me of any sin committed by Brigham Young. Maybe I should ask differently. “Did Joseph Smith and Brigham Young repent of their sins?” If yes, “What were they?” I expect - I have gotten this sort of answer before - “The confession is general, not particular. They confess that they sinned; they do not confess the specific sins themselves.” Trying to be objective, I should think that confessing sins *specifically *is more *sincere *and a greater evidence of repentance, than a general, shallow “I’m sorry but that’s all I’m going to say about it.” If that is so, then the Catholic form of repentance is “more true” than the Mormon form. Although I have also been told that when confessing to a Bishop, the penitent often has to confess not only the specific sin, but very intimate details about that sin. So, who knows which is the better method.