Impedance levels vary (20 ohms (when noise cancelling function is used) vs 32 ohms), which can affect compatibility and audio output when used with different devices. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. The frequency response differs (20 - 20,000 Hz vs 18 - 18000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. There is a noticeable difference in weight (104 g (Inclusive of Battery and Cable) vs 362 g), which may affect comfort during extended use. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. If you're comparing Audio Technica ATH-ANC25 and Sennheiser HD 203, 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. Audio Technica ATH-ANC25 and Sennheiser HD 203 offer different noise cancellation capabilities (Yes (Reduces Noise up to 15 dB) vs No), 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.

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