The frequency response differs (10 Hz - 40,000Hz vs 4 Hz - 100000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Impedance levels vary (32 Ohms vs 56 ohm), which can affect compatibility and audio output when used with different devices. Denon AH-MM400 and Sony MDR-Z7M2 are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. Denon AH-MM400 and Sony MDR-Z7M2 offer different noise cancellation capabilities (Yes vs NA), which can impact how effectively they block external noise. The driver size differs between the two (40 mm vs 70 mm), which can influence sound depth, bass response, and overall audio clarity. From a usability standpoint, both models provide a reliable and premium headphone experience. There is a noticeable difference in weight (310 g vs 340 Gm), which may affect comfort during extended use. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel.

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