Are the Tung Sol EL34B's the same as the Ruby (Chinese) EL34BSTR's?
Another tube I would look into are the Ruby EL34BHT's. They are able to handle high plate voltages and are very robust tubes, like the SED's. My two favorite EL34 tubes are the SED's and Ruby BHT's. If you're looking at the Ruby BSTR, I would highly consider the BHT instead. Along with the SED's, they are probably the two best new production tube in terms of reliability and "tone."

Whatever that is.
I currently have three different sets of tubes that I've been playing with: JJ E34L, SED =C= and Ruby EL34BHT. Amps are Diezel VH4 and my Metro 1959 Super Lead. In my VH4, I prefer the Ruby BHT's. They have a less pronounced low-end than the other two and seem to brighten up the VH4 slightly. The mid range is comparable to the SED's, but grinds a bit more in my VH4. The Diezel has tons of low-end, almost too much at times. So I find the BHT's to really tame that part of the amp. The SED's sound a bit muddy in the VH4 due to their low-end and rounded top-end.
In my 1959, the JJ E34L's are very aggressive and drive the amp harder. More gain. But, they are a bit cold sounding. Not bad. But not great either. The BHT's have the exact opposite effect in this amp. Muddy. Dark. Loose. The SED's sound the best! Very nice mid range, not harsh and tight, but not overbearing low-end.
All three have their place. Just depends on the amp!