The house edge is the main difference between the 3 variations. The American Roulette wheel has a double zero on it, along with the single zero. The European and French wheel only has the single zero. The house edge in the American version is usually 5.26. In the European version, it is 2.7. The French version will pay players half their bet if the ball lands on the zero. The French version house edge is 1.35.