I think that is the contrast yes. Overall, Acker is the more diverse actress and brings a greater growth to her character over the show, whereas Faith is the more iconic character who had the great impact on the show(s), but while ED is good she doesn't quite have Acker's range.That's the first real tough one for me. I love both characters so much, for very different reasons. It might come down to who I like best as an actress, and that would be Amy Acker. But I'm still not decided.