Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. From a usability standpoint, both models provide a reliable and premium headphone experience. Impedance levels vary (32/80/250 Ohms vs 250 Ohms), which can affect compatibility and audio output when used with different devices. There is a noticeable difference in weight (270 g vs NA), which may affect comfort during extended use. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Beyerdynamic DT 770 PRO and Koss PRO-4AA are premium wireless headphones designed to deliver high-quality sound along with advanced features like noise cancellation and long battery life. The frequency response differs (5 Hz - 35000 Hz vs 10 Hz - 25000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel.

Verdict: Both models are competitive, and your decision should be based on your usage needs and preferred features.