There is a noticeable difference in weight (NA vs 45 Gm), which may affect comfort during extended use. Battery life varies between the two (6 Hours vs 10 / 40 Hours), which affects how long you can use them on a single charge. boAt Rockerz 255R and boAt Immortal 121 offer different noise cancellation capabilities (No vs NA), which can impact how effectively they block external noise. boAt Rockerz 255R and boAt Immortal 121 are premium wireless headphones designed to deliver high-quality sound along with advanced features like noise cancellation and long battery life. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. Impedance levels vary (16 ohm vs NA), which can affect compatibility and audio output when used with different devices. Both models provide a wide frequency range, delivering a balanced audio experience across different types of content. boAt Rockerz 255R uses Bluetooth 4.1 while boAt Immortal 121 supports Bluetooth 5.3, which can impact connectivity stability and efficiency. From a usability standpoint, both models provide a reliable and premium headphone experience.

Verdict: Choosing between boAt Rockerz 255R and boAt Immortal 121 depends on whether you value better sound, longer battery life, or enhanced features.