In a way, the two cars could not be more different. They come from different parts of the world. Their customers usually were from different cultural and philosophical molds. Although they both had the some goals -- to go fast -- one did it on road coarses, the other on drag strips, so they did not even agree on the definition of fast.
They did share one thing however; the three letters, GTO. Wheather by design or coincidence, this fact has caused the two cars to be compared and has generated a bond that will exist as long as fast cars are admired.