Tube identification question

“there are plenty of alternatives to the 6J1 out there, and very cheap. There’s the Russian mil-spec version of the 6J1 – the 6J1P-EV. Then there is the bewildering array of western equivalents: the 6AK5 and its military brother the 6AK5W; the 5654 and its military spec version, the 5654W; another is the EF95; the 403A; the 6F32; the CV (common valve) 4010; the brilliant M8100; the list goes on and on. I’ve heard from those in the know that the AEG F95 is a very good tube – very well made and sweet sounding.

If I were to suggest alternatives, try the military specs versions – 6AK5W, the 5654Ws, or the CV4010, although the latter, like the M8100, is hard to get.”

I ordered the GE JAN 5654W, which is a milspec tube (without the W is the regular one), and it sounds great, the other tubes too aren’t nearly as hard to find as the 6J1 either.”