Impedance levels vary (600 Ohms vs 250 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. There is a noticeable difference in weight (360 g vs 370 g), which may affect comfort during extended use. The driver size differs between the two (NA vs 45 mm), which can influence sound depth, bass response, and overall audio clarity. The frequency response differs (5 Hz - 50000 Hz vs 5 - 40 000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. 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. If you're comparing Beyerdynamic T 1 and Beyerdynamic DT 1990 PRO, both models offer a strong combination of sound performance, comfort, and modern wireless features. From a usability standpoint, both models provide a reliable and premium headphone experience.

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