How about we expand this thread into a whole slew of Cavendish vs. Cancellara questions just to really rub it in?
1) Who would win a 1km prologue (like that one in the Giro a few years ago)? Cancellara.
2) Who would win anything longer than that 1km prologue? Cancellara.
3) Who would win a popularity contest among riders? Cancellara.
4) Who would win a popularity contest among Flemish fans. Oh, wait, Cancellara already won that.
5) Who would win a massive new contract and expensive buy-out of his old contract to ride where he wants? Wait, Cancellara already won that one, too.
6) Whom would any reasonable woman prefer? Cancellara.
7) Who can confidently predict when he's going to win a monument or world championship? Cancellara.
8) Who is so bad at handling the constant pressure of public scrutiny that he cries like a baby when he (finally) delivers a result? Okay, Cav wins one.