Audio performance is primarily determined by two factors: the digital resolution (sample rate/bit depth) and the quality of the DAC.
While the Dragonfly Red supports up to 24-bit/96 kHz, the WiiM Mini functions as a high-fidelity digital transport capable of outputting up to 24-bit/192 kHz via its Optical port. When paired with a high-quality external DAC, the WiiM Mini setup can match or even exceed the sound quality of a mobile USB DAC setup, offering a higher ceiling for high-resolution audio.