The driver size differs between the two (NA vs 40 mm), which can influence sound depth, bass response, and overall audio clarity. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. If you're comparing Koss UR29 and JBL E35, both models offer a strong combination of sound performance, comfort, and modern wireless features. Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience. The frequency response differs (18 Hz -20000 Hz vs 20 Hz - 20000 kHz), which can influence how well the headphones reproduce lows, mids, and highs. Impedance levels vary (100 Ohms vs 32 ohm), 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. There is a noticeable difference in weight (NA vs 168 gm), which may affect comfort during extended use.

Verdict: Choosing between Koss UR29 and JBL E35 depends on whether you value better sound, longer battery life, or enhanced features.