What are the differences between brake rotors and disc brakes, and how do they affect the performance of a vehicle?

Brake rotors are the flat, metal discs that the brake pads press against to slow down the vehicle, while disc brakes refer to the entire braking system that includes the rotors, pads, calipers, and other components. The design and material of the rotors can affect the braking performance of a vehicle, with factors such as size, weight, and cooling capabilities influencing how effectively the brakes can stop the vehicle. Upgraded rotors can improve braking performance by providing better heat dissipation and reducing brake fade during heavy use.