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. There is a noticeable difference in weight (250 g vs 227 GM), which may affect comfort during extended use. Beyerdynamic DT 990 PRO and Audio Technica ATH-GDL3 are premium wireless headphones designed to deliver high-quality sound along with advanced features like noise cancellation and long battery life. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Beyerdynamic DT 990 PRO and Audio Technica ATH-GDL3 offer different noise cancellation capabilities (NA vs Sound Isolation), which can impact how effectively they block external noise. The frequency response differs (5 Hz - 35000 Hz vs 10Hz - 35KHz), which can influence how well the headphones reproduce lows, mids, and highs. Impedance levels vary (250 Ohms vs 45 ohm), which can affect compatibility and audio output when used with different devices. The driver size differs between the two (NA vs 45 mm), which can influence sound depth, bass response, and overall audio clarity.

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