The major distinction between American and European Roulette is in their layouts. While the former has a zero and a double zero (00), the latter has just one zero (0) pocket. The presence of the double zero increases the house advantage of American Roulette to 5.26%. On the flip side, the absence of this segment on European Roulette gives it a house advantage of 2.7%, a figure that favours players in the long run.