Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience. If you're comparing boAt Rockerz 255 ARC and boAt Airdopes 121 v2, both models offer a strong combination of sound performance, comfort, and modern wireless features. The driver size differs between the two (10 mm X 2 vs 8 mm), which can influence sound depth, bass response, and overall audio clarity. The frequency response differs (20 Hz - 20000 Hz vs 24 Hz - 24000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. There is a noticeable difference in weight (28 Gm vs 36 Gm), which may affect comfort during extended use. Battery life varies between the two (30 Hours vs 3.5 / 14 Hours), which affects how long you can use them on a single charge. boAt Rockerz 255 ARC uses Bluetooth 5.2 while boAt Airdopes 121 v2 supports Bluetooth 5.0+EDR, which can impact connectivity stability and efficiency. boAt Rockerz 255 ARC and boAt Airdopes 121 v2 offer different noise cancellation capabilities (CVC vs NA), which can impact how effectively they block external noise.

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