Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. There is a noticeable difference in weight (NA vs 217 Gm), which may affect comfort during extended use. The driver size differs between the two (40 mm vs 38 mm), which can influence sound depth, bass response, and overall audio clarity. The frequency response differs (20 Hz - 20000 Hz vs 14 Hz - 26000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Impedance levels vary (85 Ohms vs 50 ohm), which can affect compatibility and audio output when used with different devices. 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. Urbanears Zinken and Sennheiser HD 559 offer different noise cancellation capabilities (NA vs AMBIENT), which can impact how effectively they block external noise. Urbanears Zinken and Sennheiser HD 559 are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features.

Verdict: Both models are competitive, and your decision should be based on your usage needs and preferred features.