I find it had to believe Linlai has created two completly separate product lines. The "marketing" ploy would seem more logical.
@bigtwin It is great marketing to make the Westerners think they are getting a tube made specifically for their preferences. And the higher price can also be a marketing ploy for Americans.
If you've read through the thread, many members believe the two tube types are the same. Adding the vertical logo to establish a different brand is easily done. But, earlier in this thread, photos show the two tube types have different bases. Why bother with this modification when a different logo satisfactorily separates the two brands?
I'm done speculating as to what Linlai is selling. The fact that Don Sachs uses the E-6SN7 from a Chinese vender is very telling.

