incredulousity
Headphoneus Supremus
I have both also, and with stock tubes I agree. I changed the driver tube on HA-2SF to a Gold Lion one and I like it better. I also changed the power tubes to the gold pin versions, but this made relatively less difference, as one would expect. I like both amps very well now, but Euforia AE is much more versatile in the tube rolling department, especially with powered adapters.I prefer Feliks Euforia AE over HA2SF.
That said, both amps will probably be replaced by a single Feliks Envy at some point.