r slash swingers vs r slash polyamory — why does the vibe of those two subs feel so different

lurker on both subs for years now (we're a couple in our forties, swinging side, been at it about 7 yrs). i find r/swingers genuinely useful, mostly down to earth, lots of practical "how do u handle this at a club" or "wife wants to try this, im nervous" kind of posts and the answers tend to be grounded. r/polyamory feels like a completely different planet to me though — more theory, more vocabulary, more "you're doing it wrong" energy in the comments, more processing as a public sport. im not slagging poly people off at all, im sure their version of the sub is useful to them in a way our sub doesnt do. but i find myself wondering why the cultures of those two communities ended up so different when on paper they're both "consensual non monogamy". is it the people, the format, the moderators, the fact that swinging is more behavioural and poly is more relational... whats ur theory. and have any of u who started in one ended up in the other and noticed the shift in tone in your own posting