The driver size differs between the two (40 mm vs NA), which can influence sound depth, bass response, and overall audio clarity. JBL Synchros S300-A and Koss HB79 are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Impedance levels vary (32 Ohms vs Self-powered Stereophone), which can affect compatibility and audio output when used with different devices. The frequency response differs (10 Hz - 100,000Hz vs 30 Hz - 15000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. There is a noticeable difference in weight (318 g vs NA), which may affect comfort during extended use. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience.

Verdict: Choosing between JBL Synchros S300-A and Koss HB79 depends on whether you value better sound, longer battery life, or enhanced features.