Apples to oranges? Not really, considering the layouts are even similar with 3 main turnarounds, the 3rd being underneath the 1st in both cases. They're both 125 feet tall with nearly the same drop heights, nearly the same speed and race side-to-side. The only main differences between them is that Gemini obviously has the steel tubular rails and is ~400ft shorter than Colossus in length. Try something like Gwazi vs. Gemini, you'll have apples to oranges there. They're both wooden racers and... that's pretty much it.