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
Has anyone heard or had experience with Elrog 300b tubes failing? I was very interested to get a pair but heard this from one source -cannot confirm it is true or not. Thanks
The reliability problem seems to be fixed about a year now. I own them and have no problems at all.
I have both Elrog and Takatsuki 300Bs running on line magnetic 219ia. For speakers, I used LS50 and Harbeth 7es3. Devore O93 is on the way replacing 7es3.

I probably have about 100 hrs on Elrog and 30 Hrs on Takatsuki. So, it's probably too early to say. So far, I like Elrog better. Takatsuki sounded too polite compared to Elrog. Elrog gave better dynamic, top to bottom balance and much bigger soundstage. I will give more time to Takatsuki and compare again. I am trying but always end up switching back to Elrog. :)