There is a noticeable difference in weight (90 g vs 130 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. Sennheiser PC 31-II and Beyerdynamic DT 131 are premium wireless headphones designed to deliver high-quality sound along with advanced features like noise cancellation and long battery life. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. The frequency response differs (40 Hz - 18000 Hz vs 20 Hz - 18000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Impedance levels vary (32 Ohms vs 40 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.

Verdict: Choosing between Sennheiser PC 31-II and Beyerdynamic DT 131 depends on whether you value better sound, longer battery life, or enhanced features.