Elrog 300B vs Takatsuki 300B tubes


Has anyone heard the Elrog 300B tubes ? I read an article which mentioned that the Elrog 300B delivers 15% less power than a traditional 300B tubes. Can anyone confirm that it is audible ?

I am choosing between Elrog and Takatsuki 300B tubes. I would prefer the Elrog because it is cheaper and supposedly wonderful but if it really sounds less powerful then I have to rethink.
pani
Matthias,
Thank you for that encouraging and reassuring post. I patiently and eagerly await receiving my replacement Elrog tubes from George. I believe this thread and your contributions have been helpful to quite a few here.
Charles,
Mathaias, my Elrog 300B tubes are still functioning properly, but have only about one month of warranty left. Will Elrog accept a return on my tubes and send me a pair suitable for my Coincident Frankenstein amps?
You gotta love people who are dedicated to providing quality service. Tube matching to your particular amplifier! Awesome! Gotta love it. Well done, Matthias. Now I have to figure out how to get the operating parameters for my LadyDay+ amps.
Matthias, I too am waiting for George to send me a suitable pair for my Franks.
Thanks to you and George for sorting all this out. It's commendable of you two.

Best,
Joe
Joe,
My initial experience with George was three years ago when he sold me my pair of EML tubes. I was very impressed with his responsiveness and good attitude and I knew that customer service was very important to him. Well, he's done it again with his handling of the situation concerning the Elrog tube and various amplifiers, I give him a grade of A+!
Charles,