Sennheiser HD 800 and Beyerdynamic DT 1770 PRO MKII are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. There is a noticeable difference in weight (Approx 330 g vs 377 GM), which may affect comfort during extended use. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. 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. The driver size differs between the two (NA vs 45 mm), which can influence sound depth, bass response, and overall audio clarity. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. The frequency response differs (6 Hz - 51000 Hz vs 5Hz - 40KHz), which can influence how well the headphones reproduce lows, mids, and highs. Impedance levels vary (300 Ohms vs 30 ohm), which can affect compatibility and audio output when used with different devices.

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