Impedance levels vary (48 ohms vs 32 Ohms), which can affect compatibility and audio output when used with different devices. The frequency response differs (10 - 24,000Hz vs 30 Hz to 20000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Audio Technica ATH-S300 and Koss UR-20 are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. From a usability standpoint, both models provide a reliable and premium headphone experience. There is a noticeable difference in weight (140 g vs NA), which may affect comfort during extended use. The driver size differs between the two (40 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. Audio Technica ATH-S300 and Koss UR-20 offer different noise cancellation capabilities (No vs NA), which can impact how effectively they block external noise. 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.