In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. If you're comparing Koss UR23i and JBL E35, both models offer a strong combination of sound performance, comfort, and modern wireless features. Impedance levels vary (34 Ohms vs 32 ohm), which can affect compatibility and audio output when used with different devices. There is a noticeable difference in weight (NA vs 168 gm), which may affect comfort during extended use. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. The frequency response differs (20 Hz - 20000 Hz vs 20 Hz - 20000 kHz), which can influence how well the headphones reproduce lows, mids, and highs.

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