The driver size differs between the two (30 mm vs NA), which can influence sound depth, bass response, and overall audio clarity. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. There is a noticeable difference in weight (150 g vs NA), which may affect comfort during extended use. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Sony MDR-ZX110NC and Koss UR20 offer different noise cancellation capabilities (Yes vs NA), which can impact how effectively they block external noise. Impedance levels vary (Power ON 220 Ω, OFF 45 Ω vs 32 Ohms), which can affect compatibility and audio output when used with different devices. The frequency response differs (10Hz - 22,000Hz vs 30 Hz to 20000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. If you're comparing Sony MDR-ZX110NC and Koss UR20, both models offer a strong combination of sound performance, comfort, and modern wireless features. From a usability standpoint, both models provide a reliable and premium headphone experience.

Verdict: Both headphones offer strong performance, and the right choice depends on your priorities such as battery life, comfort, and noise cancellation.