There is a noticeable difference in weight (NA vs 273 Gm), which may affect comfort during extended use. Koss Pro4s and SHURE SRH840A offer different noise cancellation capabilities (NA vs CVC), which can impact how effectively they block external noise. If you're comparing Koss Pro4s and SHURE SRH840A, both models offer a strong combination of sound performance, comfort, and modern wireless features. The frequency response differs (10 Hz - 25000 Hz vs 5 Hz - 25000 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. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Impedance levels vary (35 Ohms vs 40 ohm), which can affect compatibility and audio output when used with different devices.

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