I don't know that this answer is so simple.

Tony has certainly got a few good years behind him. But now that Smush has gotten a chance to show his stuff full time with the Lakers he is not doing too badly. And that is having to play next to Kobe, "Pistol Pete is My Idol", or I never saw I shot I didn't like, Bryant.

regular season tony parker, but in playoff time i'm not so sure tony parker cracks against the better pg's and we have not seen if smush handles pressure good since he has not been in the playoffs yet, at least i think he hasn't.

Tony Parker did a fine job on Steve Nash. I think that TP can play with Jason Terry. That leaves Baron Davis as the last elite PG in the West (IMO). I think BDiddy causes matchup problems for everyone.

I would take Tony over William.