Though I've not extensive first hand exp with Tele v other 12AX7's, I'd say the RCA & Tele's are very close in character to one another. One main USA tube vendor personally told me their diffs were very slight, meaning to me unless one has a very resolvling rig, they likely won't notice the diffs.
I've been reasonably well pleased using RCA tubes in several preamp or amp selections. In comnbination with Tungsols, Matsushita, & Amperex Bugle boys.
I've also found that several makes of tubes have a particular voice of their own generally speaking. Amperex's are bold and up front tubes, with all the audiophile needs being addressed. RCA as was posted are more subdued or reserved in terms of detail leaning towards the warmer side of the border. Tungsols resemble the Amperex's like Rotel emulates the Krell... but for less 4$$. tele's have great mids and top ends but their bass is not their strengths.
tastes, combinations of these, the gear too, can and will provide your audio system with many hours of interesting outcomes as you plug in and out various sorts.
you can also try buying some used ones and see for yourself what's up with who, for a bit less dough than buying reputedly new old stockers.
The tube vendor's rep and/or the seller's rep, is more important than the tube in question. you certainly don't want to buy tubes with issues or nearing the end of their cycle... or noisey & microfonic.
Good luck.