If I were subscribed to both those places and saw posts from either of those places, it would make zero difference for which server they are. And the same goes for 99.99% of users. You have to be lost pretty far in the weeds to know the nuance and difference between the two.

I don't think clash is the right way to think about it. It's missing half the discussion to see just one. That's the problem.

And with the way things are, users will not double post to each, eventually one of the two will wither and die. For most communities, this situation of two communities will not even exist.