Cadel, if no one has not already mentioned it, has the race "wisdom" advantage here. Wiggins can do well in the shorter stage races and has never look better.
The problem is a Grand Tour is three weeks and Wiggo has yet to figure that out. He has never looked better and the parcours seem to suit him better this year, but my money's still on Cadel. Wiggins will most likely have some bad mountain days down toward the end and Cadel can manage the ITT with time gained in mountains.
Cadel will leave Wiggins in the Yellow Jerseys... exhustig his team, and take it off him in the Pyrenees.