What are the differences between cardioid and supercardioid microphones for live vocals?

The main difference between cardioid and supercardioid microphones for live vocals is their pickup patterns. A cardioid microphone captures sound from the front and sides, while a supercardioid microphone has a narrower pickup pattern that focuses more on the front and reduces side noise. This makes supercardioid microphones better at isolating the vocalist's voice and reducing feedback on stage.