Roulette table layouts, on the other hand, are for the most part the same. Each functions differently, with its own unique sequence and internal logic. As far as the wheels are concerned, you will find three major variations out there – European, American, and Triple Zero. In reality, much care and attention have gone into crafting each wheel type. But that cannot be further from the truth. One might look at the numerous roulette wheel numbers and their positions and think that it is a random sequence.