Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Audio Technica ATH-ANC9 and Beyerdynamic DT 880PRO 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 (10 - 25,000Hz vs 5 - 35.000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. There is a noticeable difference in weight (220 g (Inclusive of Battery and Cable) vs 295 g), which may affect comfort during extended use. The driver size differs between the two (40 mm vs NA), which can influence sound depth, bass response, and overall audio clarity. Audio Technica ATH-ANC9 and Beyerdynamic DT 880PRO offer different noise cancellation capabilities (Yes (Reduces Noise up to 30 dB) vs NA), which can impact how effectively they block external noise. Impedance levels vary (100 ohms (when noise cancelling function is used) vs 250 ohm), which can affect compatibility and audio output when used with different devices. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience.

Verdict: Choosing between Audio Technica ATH-ANC9 and Beyerdynamic DT 880PRO depends on whether you value better sound, longer battery life, or enhanced features.