Yes. Close enough that I cannot, with any degree of reliability, distinguish between either Eitr/USB Gen 5 and my Aries via AES (which I previously considered to be the best source I'd heard into Yggdrasil via AES or any other input). I would say so. If you're using a computer as the source I would just go with the USB Gen 5 you'll get as part of a new Yggdrasil and call it good. I'd rank the inputs as: AES = USB Gen 5 >= S/PDIF BNC >= S/PDIF RCA > Optical This assumes an interface on the level of Eitr/Aries for the non-USB connections (in other words, if you use a lower quality AES source, it's very likely that the USB Gen 5 input will beat it). With some other interfaces/DDCs/sources the differences between AES and the BNC/COAX connections, and especially the optical connection, will be more varied. At this point, with Yggdrasil (and I have no reason to believe it'll be any different with Gungnir) the only reasons to use the non-USB Gen 5 inputs are a) because your source (CD transport, Roon end-point or other streamer) requires something else or b) you want to use more than one input.