Impedance levels vary (250 Ohms vs 32 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. If you're comparing Beyerdynamic T 90 and Beyerdynamic MMX 300, both models offer a strong combination of sound performance, comfort, and modern wireless features. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. The frequency response differs (5 Hz - 40000 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. From a usability standpoint, both models provide a reliable and premium headphone experience. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. There is a noticeable difference in weight (425 g vs 332 g), which may affect comfort during extended use.

Verdict: Choosing between Beyerdynamic T 90 and Beyerdynamic MMX 300 depends on whether you value better sound, longer battery life, or enhanced features.