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?
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?
