Different rotor designs in roulette wheels affect outcomes by influencing the ball's movement and bounce dynamics, which can impact randomness. Rotors with varying slopes, depths, and materials can alter the speed and trajectory of the ball, creating distinct patterns in how it lands. Some designs may produce more consistent outcomes if the ball interacts predictably with pockets, while others enhance randomness by creating irregular ball behavior. Maintenance and design integrity are essential, as subtle imperfections in rotor designs can introduce biases over time, impacting the fairness of the game.