boAt Rockerz 275 V2 uses Bluetooth 5.0 while boAt Immortal 121 supports Bluetooth 5.3, which can impact connectivity stability and efficiency. Both models provide a wide frequency range, delivering a balanced audio experience across different types of content. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. There is a noticeable difference in weight (30 gm vs 45 Gm), which may affect comfort during extended use. boAt Rockerz 275 V2 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. From a usability standpoint, both models provide a reliable and premium headphone experience. Battery life varies between the two (8 Hours (150 mAh) vs 10 / 40 Hours), which affects how long you can use them on a single charge. boAt Rockerz 275 V2 and boAt Immortal 121 offer different noise cancellation capabilities (No vs NA), which can impact how effectively they block external noise. Impedance levels vary (16 ohm vs NA), which can affect compatibility and audio output when used with different devices.

Verdict: Both models are competitive, and your decision should be based on your usage needs and preferred features.