Friends had them and sold them (used in TRP) from that same reason you wrote but some might like it. My advise would be to stick with the Russian one you got the unit with. Just give it time amd it will reward you…
thanks @Golum
Looks like I am not imagining. I bought the Sophia based on some thread here where they liked it in their Lampi DAC. It’s a bit surprising that Sophia would make something like this as they are generally very good with their tubes. Not sure if I got a bad one and I have no way to find it out except to buy another one and then compare. I have the EML 5u4g and quiet like them as well - its sounds more fuller and rich. It’s been a while since I listened to the stock Russian. Can you elaborate what you mean by “give it time” ? Needs more break-in ?