There is a noticeable difference in weight (332 g vs 290 g), which may affect comfort during extended use. Impedance levels vary (32 ohm vs 600 ohm), which can affect compatibility and audio output when used with different 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. 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. Beyerdynamic MMX 300 and Beyerdynamic DT 990Edition are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. The frequency response differs (5 - 35 000 Hz vs 5 - 35.000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment.

Verdict: Choosing between Beyerdynamic MMX 300 and Beyerdynamic DT 990Edition depends on whether you value better sound, longer battery life, or enhanced features.