What are the main differences between brake discs and rotors, and how do they impact the performance of a vehicle's braking system?

Brake discs and rotors are actually the same component in a vehicle's braking system. They are both flat, circular metal discs that are attached to the wheel hub and rotate with the wheel. When the brake pedal is pressed, brake pads clamp down on the discs/rotors to create friction and slow down the vehicle. The main difference lies in the terminology used in different regions - "discs" is commonly used in Europe, while "rotors" is more common in North America. The design and material of the discs/rotors can impact the braking performance, with factors such as size, weight, and cooling capabilities affecting how efficiently heat is dissipated during braking, ultimately influencing the overall braking performance of the vehicle.