The driver size differs between the two (NA vs 40 mm), which can influence sound depth, bass response, and overall audio clarity. 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 DT 109 Series and Audio Technica ATH-PRO5X offer different noise cancellation capabilities (NA vs Sound Isolation), which can impact how effectively they block external noise. There is a noticeable difference in weight (390 g vs 250 GM), which may affect comfort during extended use. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. Impedance levels vary (400 ohm vs 34 ohm), which can affect compatibility and audio output when used with different devices. Beyerdynamic DT 109 Series and Audio Technica ATH-PRO5X are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. The frequency response differs (30 - 20.000 Hz vs 5Hz - 35KHz), which can influence how well the headphones reproduce lows, mids, and highs.

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