How does the audio output of SNES hardware perform? I've been told it's more accurate but it's not something I've looked into.
Personally I wouldn't really classify the DAC/audio signals from any of the Genesis models as great. The inherent distortions in the sound chip is more than enough for me, and that is the one kind of non-linearity I do appreciate since it fundamentally alters the timbre of the sounds in a cool way.
My SNES sounds slightly muddy in comparison to my crystal clear Genesis. SNES also doesn't sound as loud as Genesis with the console's volume slider up all the way.
SNES sound output is still fantastic though. Just not quite as crisp. In comparison, Genesis is so clean that it sounds almost digital.