I am familiar with the whole picture, ie gearing and traction. I swapped the rear end in the z to an R200, and the tranny to a T-5 for that purpose. It still would have outrun my contour with the 4 speed and R180 rear diff, because it has a lot more power, plain and simple.
I think Hp and power to weight is a big piece of the puzzle, not a small one. That is why you, and I and many others spend countless hours and thousands of dollars beefing up the hp in our cars, and swapping body panels for lighter pieces before we touch the diff.
Anyway, you are right in saying that they all work together and that people need to consider this
...back to the srt comparison, the neon still has the advantage with power and torque curve.