You won't be able to tell what line it is by the way it looks, it is most likely either a Orange Ghost, a Yellow Ghost or a Butterscotch Ghost which ever one it is it doesn't matter to much as they are all compatible! We have over 30 Ghost/Ghost combos and all of them but one is an Orange Ghost the other one is a Yellow Ghost but it looks exactly the same as all of our others.
Hope that helps a little.