To iliketennis: Well, this way you're just stating that Hewitt's and Nadal's games are both similarly inferior, and that Federer doesn't have any problems with Nadal at all, if not on clay.
However, next time Federer meets those 2 players on hard court, for example like this:
US open 2005:
Semi-Final: Federer - Hewitt
Final: Federer - Nadal
(or the other way around, Nadal semi, Hewitt Final)
Do you really believe Hewitt and Nadal have equal chances? I'm pretty sure Fed will be way more confident going into the Hewitt match. I will also feel so, and so will all bookmakers do.
If you don't believe so, I just hope you'll be right (being a Federer fan myself ...
). But obviously, if you think Hewitt's and Nadal's games are equally inferior to Federer, there's no point in trying to answer my question (about Hewitt imitating Nadal's style to play Federer)... Maybe someone else?