Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. The frequency response differs (18 Hz - 20000 kHz vs 20 Hz - 20000 kHz), which can influence how well the headphones reproduce lows, mids, and highs. There is a noticeable difference in weight (231.6 gm vs 274 gm), which may affect comfort during extended use. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. JBL LIVE 500BT and JBL Quantum 400 offer different noise cancellation capabilities (Active vs NA), which can impact how effectively they block external noise. JBL LIVE 500BT and JBL Quantum 400 are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment.

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