Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. There is a noticeable difference in weight (3 gm vs 10 Gm), which may affect comfort during extended use. Sony MDR-EX255AP and Sennheiser CX 80S offer different noise cancellation capabilities (NA vs AMBIENT), which can impact how effectively they block external noise. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. The driver size differs between the two (12 mm vs NA), which can influence sound depth, bass response, and overall audio clarity. The frequency response differs (5 Hz - 25,000 Hz vs 17 Hz - 20000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Sony MDR-EX255AP and Sennheiser CX 80S 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. Impedance levels vary (16 ohm vs 28 ohm), which can affect compatibility and audio output when used with different devices.

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