The frequency response differs (40 Hz - 20000 Hz vs 5 - 35.000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Koss QZPRO and Beyerdynamic DT 240 PRO offer different noise cancellation capabilities (Yes vs Ambient), which can impact how effectively they block external noise. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Koss QZPRO and Beyerdynamic DT 240 PRO are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. There is a noticeable difference in weight (NA vs 196 g), which may affect comfort during extended use. Impedance levels vary (32 Ohms vs 34 ohm), which can affect compatibility and audio output when used with different devices. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment.

Verdict: Choosing between Koss QZPRO and Beyerdynamic DT 240 PRO depends on whether you value better sound, longer battery life, or enhanced features.