Even though, it’s a risk, for example !rpg@ttrpg.network and ttrpg@lemmy.blahaj.zone are two communities for the same niche which despite having different ambiences split the communities.

That said, you can follow both (they’re small so you can follow more than on reddit) and if one has a moderation/culture not pleasing you, you can move to the other one.

Fundamentally, not different from reddit having different guitar communities under different names as the main onc became a shithole.

You can also close a community to redirect it toward another one in order to limit duplicates