Impedance levels vary (24 ohms vs NA), which can affect compatibility and audio output when used with different devices. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. There is a noticeable difference in weight (71 g vs 45.5 Gm), which may affect comfort during extended use. Battery life varies between the two (Music Playtime: 9 hr, Talk Time: 9 hr, Standby Time: 200 hr vs 24 / 96, 120 Hours), which affects how long you can use them on a single charge. The frequency response differs (20 - 20,000 Hz vs 20 Hz - 20000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Philips SHB4000 uses Bluetooth 3.0 while boAt Nirvana Ion supports Bluetooth 5.2, which can impact connectivity stability and efficiency. Philips SHB4000 and boAt Nirvana Ion are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. The driver size differs between the two (32 mm vs 10 mm), which can influence sound depth, bass response, and overall audio clarity. Philips SHB4000 and boAt Nirvana Ion offer different noise cancellation capabilities (No vs ENC), 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.