I have a friend who honestly did an A/B comparison of solder so just go ahead and do it. Don't worry, we'll chip in for any (non-acoustical treatment) padding needed for the room
I did some 3-4 years ago test:
Usb sticks... and Expresscard devices...
S-ata to USB adapters (connected Hdd's and Card readers)
IDE to USB (Connected Hdd's and Cd-rom drives and DVD burners)
The Card readers had CF cards, SD cards, Micro SD cards feed to them.
Micro SD cards came out on top... Followed by IDE connected DVD-burners (A plextor 760A) then came CF cards, then usb devices (usb sticks..), all connected by usb...
I had to make the comparo with a rather low tech setup, but used a Grado RS headset and a Earmax Pro with nos tubes for listening.
In my mind there was no doubt, MicroSD card via usb was the best sounding combo.
But it was 4 years ago... And it was "just for fun an afternoon.
Never did test different brands within a device "type" ...
ymmv...
and I really don't know if it is scalable, my findings...
Imp.