I agree with RailBird, Christy punches much harder, Did you happen to see the Ali vs. Joe Frazier's daughter fight. His daughter was like 39 years old and Ali couldn't knock her out and went the distance. I really think Ali is way over rated, She hasn't fought anyone, They all have been hasbeens that she has fought, Christy on the other hand has been around and will use her experience to her advantage.