Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Beyerdynamic DT 770 PRO and Beyerdynamic DT 990 PRO are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. Both models provide a wide frequency range, delivering a balanced audio experience across different types of content. Impedance levels vary (32/80/250 Ohms vs 250 Ohms), which can affect compatibility and audio output when used with different devices. There is a noticeable difference in weight (270 g vs 250 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 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. From a usability standpoint, both models provide a reliable and premium headphone experience.

Verdict: Both headphones offer strong performance, and the right choice depends on your priorities such as battery life, comfort, and noise cancellation.