I believe these have absolutely no relation to the original Tung-Sols, they're just new tubes branded with the old label which was purchased, as was Mullard, etc. by an unscrupulous business hack who makes no effort to recreate original design, just labels inferior tubes with a time-honored name or two.
New old stock is the way to go. I've had decent experience with POWER tubes from JJ Electronics and SED (formerly Svetlana, but not the NEW Svetlana which is part of this bogus new name on inferior tubes megabusiness) but I've had no real success comparing input tubes of new production to NOS tubes; NOS tubes win hands down every time.
Admittedly, I'm not using them in Leslie cabinets, and I don't know how crucial that position in the circuit is on a Leslie amp, but in my audio amps I've given up trying to use new production input/driver tubes.