Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. The frequency response differs (16 Hz - 22,000 Hz vs 5 - 40,000 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. The driver size differs between the two (NA vs 45 mm), which can influence sound depth, bass response, and overall audio clarity. Impedance levels vary (18 Ohms vs 48 ohm), which can affect compatibility and audio output when used with different devices. There is a noticeable difference in weight (190 g vs 345 g), which may affect comfort during extended use. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. If you're comparing Sennheiser Momentum and Beyerdynamic DT 900 PRO X, both models offer a strong combination of sound performance, comfort, and modern wireless features.

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