A late response, but I'll bite...
I owned both the Bifrost Multibit and the Gungnir (non Multibit).
As to be expected, the Gungnir was a step up in sound quality.
Though Schiit refuses to discuss the merits of their products, I have to say that as you move up the line, you do get a higher resolution and more detailed sound quality.
In fact, I am in line to get the Gungy upgraded to multibit and have the USB upgrade, too.
Bob
I owned both the Bifrost Multibit and the Gungnir (non Multibit).
As to be expected, the Gungnir was a step up in sound quality.
Though Schiit refuses to discuss the merits of their products, I have to say that as you move up the line, you do get a higher resolution and more detailed sound quality.
In fact, I am in line to get the Gungy upgraded to multibit and have the USB upgrade, too.
Bob