Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Impedance levels vary (32 Ohms vs 47 Ohms), which can affect compatibility and audio output when used with different devices. Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. There is a noticeable difference in weight (NA vs 53 g), which may affect comfort during extended use. Both headphones are equipped with capable drivers that deliver balanced sound output suitable for music, calls, and entertainment. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. The frequency response differs (40 Hz - 20000 Hz vs 10 Hz - 25000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. If you're comparing Sennheiser IE 4 and Beyerdynamic IDX 160 IE, both models offer a strong combination of sound performance, comfort, and modern wireless features.

Verdict: Choosing between Sennheiser IE 4 and Beyerdynamic IDX 160 IE depends on whether you value better sound, longer battery life, or enhanced features.