Hey werther,
It's too soon to tell, Azra's Ulf Be's have to break-in and his upstream gear is brand new, so therefore let's let him get some hours on the total rig.
My system with the Ulf's sits in a much larger acoustic space and is tuned to be beautiful tube based sound. Azra's system is now powered with the current reference level T&A integrated amplifier which is a terrific SS piece, but sounds different then my system. Remember, both versions of the ULf's and the DI's are conduits that purely let the upstream gear to present it's sonic voice. So, I'll give you more of an objective take on the Ulf Be's in the next couple of weeks and see what are the differences between them and the standard Ulf's that I can get a take on.