Impedance levels vary (16 ohm vs 28 ohm), which can affect compatibility and audio output when used with different devices. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. 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. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Sony MDR-EX255AP and Sennheiser CX 80S offer different noise cancellation capabilities (NA vs AMBIENT), which can impact how effectively they block external noise. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. There is a noticeable difference in weight (3 gm vs 10 Gm), which may affect comfort during extended use. The driver size differs between the two (12 mm vs NA), which can influence sound depth, bass response, and overall audio clarity. If you're comparing Sony MDR-EX255AP and Sennheiser CX 80S, both models offer a strong combination of sound performance, comfort, and modern wireless features.

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