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 (44.4 gm vs 52.6‬ Gm), which may affect comfort during extended use. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. The driver size differs between the two (6 mm vs 8.2 mm), which can influence sound depth, bass response, and overall audio clarity. LG HBS-FN6 Black and KEF Mu3 are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. The frequency response differs (NA vs 20 Hz - 20000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Battery life varies between the two (15 Hours vs 9 / 15 Hours), which affects how long you can use them on a single charge. Impedance levels vary (NA vs 16 Ohm), which can affect compatibility and audio output when used with different devices. LG HBS-FN6 Black and KEF Mu3 offer different noise cancellation capabilities (NA vs Active NC), which can impact how effectively they block external noise.

Verdict: Choosing between LG HBS-FN6 Black and KEF Mu3 depends on whether you value better sound, longer battery life, or enhanced features.