Same as in "beards"? well yeah, BeardBoard didn't invent beards nor has patents on it. so?
And just to make things correct - it's not even "same" in a bit (talking about BeardSociety)...
Here there's X, there there's Y and on other places you might find Z. we complete each other.
I don't see any conflict by having 2 different boards with same niche - yet different overview.
I do see a conflict having another chat channel for "a part" within the beard niche community.
Keen and interested only in moustaches? you can find "just that" on handlebarclubforum.org.