The driver size differs between the two (30 mm vs 40 mm), which can influence sound depth, bass response, and overall audio clarity. Sony NWZ-WH303 and JBL Quantum 350 Wireless are premium wireless headphones designed to deliver high-quality sound along with advanced features like noise cancellation and long battery life. Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience. There is a noticeable difference in weight (292 g vs 252 Gm), which may affect comfort during extended use. Impedance levels vary (30 ohm vs 32 Ohm), which can affect compatibility and audio output when used with different devices. Sony NWZ-WH303 uses Bluetooth 4.2 while JBL Quantum 350 Wireless supports Bluetooth Wireless, which can impact connectivity stability and efficiency. The frequency response differs (30 - 20,000 Hz vs 20 Hz - 20000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Battery life varies between the two (20 Hours vs 22 Hours), which affects how long you can use them on a single charge. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience.

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