We have people playing on Xbox One, in which their wins go towards the clan, with us playing on Xbox 360. I am assuming PlayStation will be similar.
so the only difference is you can't play with them on xbox one since different console
Clans can contain members who have accounts on any of the 5 platforms (Xbox 360, Xbox One, PS3, PS4, and PC). Any member can have profiles on any of those 5 thus allowing them to play on any of those platforms and still contribute to the clan. No platform is able to play with another platform, but your wins with other clan members will still be contributing to your clan.