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. Denon AH-MM400 and Beyerdynamic DT 1770 PRO offer different noise cancellation capabilities (Yes vs NA), which can impact how effectively they block external noise. Impedance levels vary (32 Ohms vs 250 Ohms), which can affect compatibility and audio output when used with different devices. The driver size differs between the two (40 mm vs 45 mm), which can influence sound depth, bass response, and overall audio clarity. Denon AH-MM400 and Beyerdynamic DT 1770 PRO are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. From a usability standpoint, both models provide a reliable and premium headphone experience. There is a noticeable difference in weight (310 g vs 388 g), which may affect comfort during extended use. The frequency response differs (10 Hz - 40,000Hz vs 5 Hz - 40000 Hz), which can influence how well the headphones reproduce lows, mids, and highs.

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