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Thanks. What I meant to ask was, given X is the same topic, what is the difference between X overflow and x.stackexchange.com? That is, if there is a general ru

Thanks. What I meant to ask was, given X is the same topic, what is the difference between X overflow and x.stackexchange.com? That is, if there is a general rule. Perhaps the answer is the same: It's just age. But then if X Overflow already existed, why create a redundant x.stackexchange.com?

dbaupp 9y ago
For the specific case of X = Math, https://math.meta.stackexchange.com/questions/41/differences-between-mathoverflow-and-math-stackexchange https://math.meta.stackexchange.com/questions/41/differences... .
- drewmate 9y ago
  That is interesting. I can see the logic there, mostly I'm just impressed that both sites maintain a critical mass of activity, since (at least in recent years) SX seems to require a pretty high level of engagement to get out of perpetual beta. Does anyone know of any other cases with two similar but distinct SX communities?
  - allenz 9y ago
    Taking a look through https://stackexchange.com/sites https://stackexchange.com/sites, I see several fairly specific programming communities: askubuntu.com and unix.stackexchange.com vi.stackexchange.com and emacs.stackexchange.com stackoverflow.com and codereview.stackexchange.com