There is a noticeable difference in weight (10.5 Gm vs 8.6 Gm), which may affect comfort during extended use. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. If you're comparing Denon AH-C820 and Denon AH-C720, both models offer a strong combination of sound performance, comfort, and modern wireless features. Both models provide a wide frequency range, delivering a balanced audio experience across different types of content. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. 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. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment.

Verdict: Choosing between Denon AH-C820 and Denon AH-C720 depends on whether you value better sound, longer battery life, or enhanced features.