Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience. Impedance levels vary (40 ohms vs 16 Ohm), which can affect compatibility and audio output when used with different devices. There is a noticeable difference in weight (230 g without cable vs 54 Gm), which may affect comfort during extended use. Battery life varies between the two (Music Playtime: 13 hr, Talk Time: 10 hr, Standby Time: 150 hr vs 28 Hours), which affects how long you can use them on a single charge. Sony MDR-ZX750BN uses Bluetooth 3.0 while Soundcore Liberty 4 supports Bluetooth 5.3, which can impact connectivity stability and efficiency. The frequency response differs (8 - 22,000 Hz vs 20 Hz - 40000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Sony MDR-ZX750BN and Soundcore Liberty 4 offer different noise cancellation capabilities (Yes (Digital Noise Canceling) vs Adaptive), which can impact how effectively they block external noise. The driver size differs between the two (40 mm vs 6 X 9.2 mm), which can influence sound depth, bass response, and overall audio clarity. Sony MDR-ZX750BN and Soundcore Liberty 4 are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features.

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