If you're comparing Beyerdynamic DT 770PRO and Beyerdynamic DT 990PRO, both models offer a strong combination of sound performance, comfort, and modern wireless features. There is a noticeable difference in weight (270 g vs 250 g), which may affect comfort during extended use. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. The frequency response differs (5 - 35 000 Hz vs 5 - 35.000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. From a usability standpoint, both models provide a reliable and premium headphone experience.

Verdict: Choosing between Beyerdynamic DT 770PRO and Beyerdynamic DT 990PRO depends on whether you value better sound, longer battery life, or enhanced features.