Battery life varies between the two (>6 Hours vs 24 Hours), which affects how long you can use them on a single charge. Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience. JBL TUNE 205BT and Oppo Enco M31 are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. JBL TUNE 205BT uses Bluetooth 4.1 while Oppo Enco M31 supports Bluetooth 5.0, which can impact connectivity stability and efficiency. JBL TUNE 205BT and Oppo Enco M31 offer different noise cancellation capabilities (NA vs Max), which can impact how effectively they block external noise. The driver size differs between the two (12.5 mm vs 11.8 mm), which can influence sound depth, bass response, and overall audio clarity. There is a noticeable difference in weight (16.5 gm vs 40 gm), which may affect comfort during extended use. The frequency response differs (20 Hz - 20000 kHz vs 20 Hz ~ 20000 kHz), which can influence how well the headphones reproduce lows, mids, and highs.

Verdict: Both headphones offer strong performance, and the right choice depends on your priorities such as battery life, comfort, and noise cancellation.