The old stock refelktor Russian tubes are great tubes. Very reliable and take high plate voltages without taking a shite.
The JJ's are a harder vacuum as well compared to the sovtek/EH EL84s out there.
So it really really depends on the need of or the reality of the amplifier the bottles are to be in service with and the desires of the chap playing the fiddle.
If you like a softer feel in the output section, be it cathode biased or grid, the new censor tubes will get you there, if again, the amps designer didn't pull a cute one and run the plates at 400vdc.
If you're running high voltage or improperly designed output stages like in vintage VOX amps, or even current ones, use the old stock Russian tubes. They'll survive longer. Same goes for the Orange craze I see at the shop bi-annually.
Determine the application. Then source a bottle for the job