Alright, tested the red valvo d-getters they test good, got 5 tightly matched pairs, took a listen on the strongest one. At first they were crazy microphonic and there was this really loud noise in the right channel then it disappeared after about a minute and a few taps on one of the tubes. After that it's been smooth sailing, I put the rest to soak in isopropyl alcohol to clean them up later.
As for sound quality tube does sound pretty good, to my surprise really similar to the Valvo Hamburg PCC88 I've been listening, so the impressions I shared on those are also valid so far for me for these. Will keep listening to see if things change after some burn-in. I also want to listen to all 5 pairs to see if I can hear a big difference
But yeah the sound of the Valvo Heerlen 7L4 '59 D-Getters (and the really similar to my ears Valvo Hamburg DJ1 PCC88 '60s O-getters ) differs from the HGs in flavor certainly, can't pick a preference so far all I can say is that after I listen to one for a while then I put in the others I love the change

Then when I get complacent I switch them around again - same thing.
Will do more listening now