The frequency response differs (8Hz - 27,000Hz vs 14 Hz - 20000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. There is a noticeable difference in weight (220 g vs 206 g), which may affect comfort during extended use. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. 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. If you're comparing Sennheiser HD 380 Pro and Sennheiser HD 205 II, both models offer a strong combination of sound performance, comfort, and modern wireless features. Impedance levels vary (54 Ohms vs 32 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.