Schiit Freya plus. Is this an upgrade?

I'm thinking about getting the Freya+ and diving into the world of tube pre-amplification. It's been interesting following all the tube and tube rolling threads. Have many of you tested the Freya+? I contacted Schiit, and they noted that they swapped out the tubes for the Freya+ now for JJ 6sn7. Schiit directly notes that "found these to be better performing than the Tung Sol or Sylvania tubes we were using before in every way." After reading all the tube rolling around Tung Sols, I'm curious if you guys have tested this, and agree that the JJ are just better than the Tung Sols, and other available options? No need to upgrade now over the stock JJ 6sn7? thanks!