Impedance levels vary (250 Ohms vs 32 ohm), which can affect compatibility and audio output when used with different devices. There is a noticeable difference in weight (425 g vs 332 g), which may affect comfort during extended use. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. Beyerdynamic T 90 and Beyerdynamic MMX 300 are premium wireless headphones designed to deliver high-quality sound along with advanced features like noise cancellation and long battery life. 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. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios.

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