The frequency response differs (10 - 24,000Hz vs 15 Hz - 25000 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. Audio Technica ATH-S300 and Koss KSC75 are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. 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. Audio Technica ATH-S300 and Koss KSC75 offer different noise cancellation capabilities (No vs NA), which can impact how effectively they block external noise. Impedance levels vary (48 ohms vs 60 Ohms), which can affect compatibility and audio output when used with different devices. 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.

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