Six of the "new production" brands are all made by the same company, New Sensor, in the same factories so how much different they sound from each other is debatable. They were able to acquire the naming rights from "legacy" companies like Mullard, Genalex, Tung Sol, Sovtek, and Svetlana to go along with their EH brand. I have a small stash but if I had to buy new I would probably just buy the JJ's and be done.