Sophia EL34-ST Tubes

While the Sophia EL-34's were a huge improvement over the Tung Sol EL-34B's in my Unison S6, long term listening has revealed them to be too bright on some recordings.  I also tried the Gold Lion KT-77's and found them to be similarly bright while otherwise less impressive than the Sophia's.  Since the amp was voiced for EL-34's I have ordered the Psvane EL-34PH tubes (replica of the legendary metal base Phillips EL-34's) to try.

I will report what my listening experience is once they are broken in and I've had several months of listening to them. 

KT 150 Primaluna valves for sale. As new. 

I would like to know how it compares to the KT-150 on a Primaluna too:)

I've had Sophia mesh plate 300B's and they were fantastic. 
No experience with the EL-34's though.

any issues with the Sophia EL-34 and reliability?

I agree with @cellcbern , they sound better than any other new production tube in my LTA ZOTL40 and I even prefer them over my NOS Mullard EL34 FX2. I have never owned a 300B amp so can’t compare but these tubes are the real deal.

In my Unison S6 they are a huge improvement over the Tung Sol EL34's that came with the amp.  Timbre, tonal and image density, soundstage - all improved over the stock tubes.  

The review states it has a 300B type of sound. Read this review for yourself.

https://positive-feedback.com/audio-discourse/sexy-blue-tubes-the-sophia-electric-el34-st-and-aqua-2...

If the Sophia EL34s sound like a 300B that is a significant accomplishment, and I will be placing an order tomorrow.  Can you provide info on the review?

Does anyone have any experience with these tubes?