The E63 is all wheel drive and automatic. Launching the car is not rocket science. One foot on the brake, one foot on the gas to brake boost, and let go of the brake. Traction is not a problem and that is why in the first race it easily jumps out of the hole on the Z06. The Z06 obviously has the power to weight advantage and manages to reel in the E63 running 11.89 @ 131 to the E63's 11.90 @ 120.19.
In the second run the Z06 modulates the throttle better getting an improved launch off the line but the E63 still takes it out of the hole. The Z06 owner rows the gears pretty well until it sounds like he misses a gear and lets off. Whoops, it happens even to the best of them.
With a manual sometimes you can be faster as this Z06 most definitely is but still lose.