The common accepted interpretation is that Ashe's actions on the Siren and Kitten path determine the differences between the routes. For the CQ route it's a combination of Ashe's actions and the universe pushing women together in front of Ashe, and them being more open to it, so an alternate reality that is pretty close to the other two, but somehow fueled by Ashe's CQ aura.
It's a bit weird, don't break your brain over it, because it doesn't have a neat answer. At least that's what all the debate here lead to the consensus on.