Not that reflects the automakers. Most of the technologies are done by teams. Stuff like how the frames are welded, the flex properties of the welds, the pivot points in the cars, the size of the sway bars [phuck u fluffy], the front nose aerodynamics, the radiator openings, the yaw in a car's axles, shock packages, and the mapping of the car's computers are team specific and driver specific. The rest of the cars are pretty much the same. Thy are held to certain specifications which require them to fit templates. Some teams may find certain gray areas to work in.