before I had my GTR I used to own a S2 R33 and from my experience, if both cars are stock and both get clean starts, and the drag goes on long enough the skyline is quicker... off the line the rex will be a bit quicker, in second the skyline will get its nose infront, and in third get further ahead (1-2 car lengths). Although against an sti it has little chance stock (unless my mum is driving the sti).