The Apple Bluetooth Headset 2 and 3 both perform well in terms of sound quality, but there are some differences. Headphone 3 uses a more advanced H1 chip that provides a more stable wireless connection and better audio performance. At the same time, the headset 3 also provides active noise reduction function, which can effectively isolate the surrounding noise and enjoy the music more comfortably. Therefore, if you are interested in audio quality and noise reduction, it is better to choose headphone 3. But if you don't have high sound quality requirements and a limited budget, headphones 2 is also a good choice.