Koss QZ900 and Beyerdynamic DT 287 PV MK II offer different noise cancellation capabilities (Yes vs NA), which can impact how effectively they block external noise. Koss QZ900 and Beyerdynamic DT 287 PV MK II are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. Impedance levels vary (32 Ohms vs 250 ohm), which can affect compatibility and audio output when used with different devices. The frequency response differs (20 Hz - 20000 Hz vs 10 - 30.000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. From a usability standpoint, both models provide a reliable and premium headphone experience. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. There is a noticeable difference in weight (NA vs 240 g), which may affect comfort during extended use.

Verdict: Choosing between Koss QZ900 and Beyerdynamic DT 287 PV MK II depends on whether you value better sound, longer battery life, or enhanced features.