It’s just there is an extra pocket on the American wheel (the double zero), and the sequence of numbers is different. If you look at the diagrams, that’s really the only difference. The Differences Between American and European Wheels Below it’s in text form for use in software like system testers:
You can see in the pictures above that the sequence of numbers is different for each wheel. You can use these images however you want, provided the copyright notice is not removed.
See below for a diagram (image / picture) of each roulette wheel layout, including European and American roulette wheels.
