Beyerdynamic DT 880 PRO and Audio Technica ATH-M40x offer different noise cancellation capabilities (NA vs Sound Isolation), which can impact how effectively they block external noise. Impedance levels vary (250 Ohms vs 35 ohm), which can affect compatibility and audio output when used with different devices. The frequency response differs (5 Hz - 35000 Hz vs 15Hz - 24KHz), which can influence how well the headphones reproduce lows, mids, and highs. There is a noticeable difference in weight (295 g vs 240 GM), which may affect comfort during extended use. 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. If you're comparing Beyerdynamic DT 880 PRO and Audio Technica ATH-M40x, both models offer a strong combination of sound performance, comfort, and modern wireless features. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience.

Verdict: Choosing between Beyerdynamic DT 880 PRO and Audio Technica ATH-M40x depends on whether you value better sound, longer battery life, or enhanced features.