

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.
Major version changes for any software from the OS right down to a simple notepad app should update as sequentially as possible (11>12>13>etc). Skipping over versions is just asking for trouble, as it’s rarely tested throughly.
It might work, but why risk it.
An example: if 12 makes a big database change but you skip over that version, 13 may not recognize the databases left by 11 because 12 had the code to recognize and reformat the old database while that code was seen as unnecessary and removed from 13.
Stuff like this is also why you can’t always revert to an older version while keeping the data/databases from the newer software.