The GTR is stated to be at 1100 horsepower (which it may be due to fuel) and the Protomotive Turbo is stated to be at 950 horses. On paper this is a bit of a mismatch for a mile long drag race. In practice however the 997 gets a good jump and is able to fend off the higher horsepower GTR until the very end where it is passed. A very close race thanks to how the 997 gets out of the hole.
The GTR does have the higher trap at 209 mph to 196 mph for the 911 turbo in the mile. In the 1/4 mile it is 146 mph for the GTR versus 140 for the 911 turbo. No doubt about which car is making more power.