The driver size differs between the two (40 mm vs NA), which can influence sound depth, bass response, and overall audio clarity. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Impedance levels vary (32 Ohms vs 36 Ohms), which can affect compatibility and audio output when used with different devices. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. The frequency response differs (15 Hz - 24000 Hz vs 18 Hz -22000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. There is a noticeable difference in weight (280 g vs NA), which may affect comfort during extended use. If you're comparing Philips SHO4205BB-10 and Koss UR55, both models offer a strong combination of sound performance, comfort, and modern wireless features.

Verdict: Choosing between Philips SHO4205BB-10 and Koss UR55 depends on whether you value better sound, longer battery life, or enhanced features.