Here's my two cents. YMMV.
The 59 Fotons I have do have a slight edge over the 65 pair I have, but it's very slight and could just be down to being a well matched pair, or the typical variances in tubes. I have a pair of 62 Fotons that sound equally as good as the 59s, so it likely is variance.
The Reflektors seemed to change to different construction after 60 for some of them. I found the ones that had the older almost flat disc getter (small disc, same size as the newer ufo type), sound better than the ones with the upside down big dimple like ufo getter.
I still found the Foton to sound nicer than the flatter getter Reflektors, but it's not a huge difference.
overall, I find the 50s and early to mid 60s ruskies to sound nicer than the late 60s onwards. I also find the 80s ones to not sound as nice as 50s, 60s, and 70s, with some exceptions, but one thing the 80s have going for them, is a lot more stability and consistency in test results and triode balance, making them much easier to match.
A heads up if you find any 50s/early to mid 60s 6n3p - They're a nightmare to match. I received 15 50s tubes in the last batch, and 5 of them either had a short, or were below minimum/replace value.
Of the remaining ones, I didn't end up with 5 matched pairs. Some of them matched within 2% to 10%, some were out by over 20%. I'm hoping for more batches to be able to make more matched pairs.
Based on 3 of 15 having shorts in the last batch, I don't recommend buying untested batches or pairs unless you have the means to at least test for shorts.
Old Istok and Fotons seemed to fare less well than the Reflektors, but when they're good, they're really good.