Whoever thinks Totti is better than Del Piero is either a Roma fan, a EPL fan, or an idiot.
Totti can thank his single scudetto to Batisitua. He barely had any impact on winning the WC.
Its not like Alex was a key figure either. I'd give more credit to totti in that competition but I think Alex is generally the better player. Buffon, Pirlo, Cannavaro and Grosso were the key figures in that WC win.
If I am comparing the two, I'd favor Alex over Totti even though both are world-class masters of the game.
Totti might have superior passing and both have an amazing shot but alex is a much better crosser, dribbler, more composure, and free kick taker. Totti is a lob and passing master.. but Alex brought more to the game and always delivered when it mattered the most and never lost his temper.
Totti's game allows him to play at the highest level at this old age. I'd definitely take him to the world cup if I were Prandelli. He can definitely unlock defenses better than anyone in the Italy squad today. Impact sub is the least he could do as a contribution.