We have a car carrier with two Indycars and two F1 cars. The difference is interesting: Both have different front & rear tires, but F1 cars have wider tires overall. The F1 cars I found are larger, but makers don't always adhere to scale. Weight is meaningless too, the banks feel like cast iron. But my two Indycar chassis look identical; perhaps they are from the same (model) maker. I wasn't planning to review this... and the display room is a long walk. Lol.