That’s very subjective.

Both platforms have the option for mods to tell you exactly what you did wrong; and on both, sometimes they utilize that option sometimes they don’t.

It’s entirely up to the individual mods in each specific community.

Lemmy does generally tend to be a bit more open; just because it’s a growing platform looking to expand its userbase, so the mods make a bit more of an effort to create peace/understanding vs just ban hammering any problems into oblivion.

Reddits grown big enough that it can throw its weight around a bit carelessly and have less worry of the userbase collapsing.