Key Differences

Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. The frequency response differs (25 Hz - 15000 Hz vs 5 Hz - 25,000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. 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 (NA vs 3 gm), which may affect comfort during extended use. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Impedance levels vary (32 Ohms vs 16 ohm), which can affect compatibility and audio output when used with different devices. The driver size differs between the two (NA vs 12 mm), which can influence sound depth, bass response, and overall audio clarity. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. Koss UR18 and Sony MDR-EX255AP are premium wireless headphones designed to deliver high-quality sound along with advanced features like noise cancellation and long battery life.

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