I'd give the Veyron my bet. It may be heavier than the Zonda, but it's got 4WD so the Stig can probably get on the throttle earlier on corner exit. Then of course the immense power on the straights. Even in corners, I'm sure the Veyron has quite a bit of lateral G, since it's got good amounts of downforce and gigantic tires.
After the MC12 beat the Enzo (
), I'm no longer betting against heavier cars.
Hm...just thought of something. What if they take the Veyron out on a wet track, so that we can't make the comparison and it just annoys us?