It is the same audio. For some reason, they have two identical versions of the game: the EU english for Europe and the US English for North America. I do not remember exactly but I think at some time you needed the EU version to play on EU servers (and the US to play on North America servers). So it was related to the region in which your account is registered rather than an actual difference in the game.To search for a clan, they ask for the language (this is reasonable). Yet they make a difference between US and GB English... I hope you\'ll forgive me if I speak of colors sometimes...
Btw, I tried the US and GB version of the game but it really seems the same audio to me. Someone noticed a difference? (To me \"you didn\'t see that one coming. Did you?\" really sounds British).