Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. The driver size differs between the two (13.6 mm vs NA), which can influence sound depth, bass response, and overall audio clarity. If you're comparing Urbanears Sumpan and Koss KEB15i, both models offer a strong combination of sound performance, comfort, and modern wireless features. The frequency response differs (20 Hz - 20000 Hz vs 18 Hz -20000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. Both headphones are designed for comfort and can be used for extended listening sessions without major discomfort. Impedance levels vary (32 Ohms vs 16 Ohms), which can affect compatibility and audio output when used with different devices. 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.