There is a noticeable difference in weight (130 g (without cable) vs NA), which may affect comfort during extended use. The frequency response differs (18 - 18000 Hz vs 30 Hz - 16000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. The driver size differs between the two (40 mm vs NA), which can influence sound depth, bass response, and overall audio clarity. Sennheiser HD 202-II and Koss CS95 offer different noise cancellation capabilities (No vs NA), which can impact how effectively they block external noise. Impedance levels vary (32 ohms vs 32 Ohms), which can affect compatibility and audio output when used with different devices. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. If you're comparing Sennheiser HD 202-II and Koss CS95, both models offer a strong combination of sound performance, comfort, and modern wireless features. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel.

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