Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. Both headphones are designed for comfort and can be used for extended listening sessions without major discomfort. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. 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. Koss Plug and Koss KEB15i are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. The frequency response differs (10 Hz - 20000 Hz vs 18 Hz -20000 Hz), which can influence how well the headphones reproduce lows, mids, and highs.

Verdict: Choosing between Koss Plug and Koss KEB15i depends on whether you value better sound, longer battery life, or enhanced features.