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
Hello Markus,
My Elrogs have about 220 hours of use at this  point. 
Charles, 
That's great Charles1dad. Mine failed at 184.5. I think the resistor mod has all the ear marks of being worth while.  
Markus,
I'm  optimistic and hope that your comment proves prophetic over the course of time. 
Charles, 
Hi Pani,
I had a FW J2 amp as my back-up amp. I use Frankenstein Mk.2 300b's as my main amp.
The J2 is a very good amp, detailed, very open, fast, great bass, but the Franks are more liquid and sound more natural in tone and timbre. 
The J2 had a slight grain compared directly the SET amp. Don't get me wrong it is a wonderful amp, but the 300b's push my buttons more!