ok, really though, this is a stupid question. CC has different hashkafos than Chaim Berlin, or than BMG.
It used to be that all the yeshivos had different hashkafos, but then all the other yeshivos except CC and chaim berlin weren’t able to keep their talmidim long term, and the talmidim all went to BMG, and then the yeshivos hired rebbeim from BMG and from other yeshivos, and so they all lost their hashkafos and replaced it all with BMG. And so the great yeshivos of Europe died, v’chaval al d’avdin.
If a girl wants to have BMG hashkafos, of course she should not marry a CC guy.