OK - I did search first and could not get an insight that helped. I have a new Pi4 with Rune 5 and my USB DAC died. I had the Dragonfly cobalt. I should say I indicate it died because its static as heck and I crushed it by accident.
I know the onboard audio isn't as good - I did hear that difference for a moment.
Whats the winner - or your top choice for this situation. I plan on buying another Dragonfly Cobalt later.