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.
 Like others my go to has been the bulletproof EML and previous to that I did use the Sofia RP, they sounded great like others have reported one can fail prematurely and leave you with a chalange finding a match.

I see the Elrog’s are still for sale, curiously has anyone revisited the Elrog 300b and has the reliability issues been sorted out?
@ianderson  I have had new Elrogs, purchased April 2018, in my amplifier running almost daily with no issues. Under new ownership, the QC issues seem to have been ironed out.
I have new Elrog 300Bs in my SET monoblocks with about 500 hrs on them without problem..great tubes..
It’s good to hear that the current production Elrogs may have gotten the QC issues properly identified and addressed. As posted early in this thread I had the initial run of the Elrogs 300b and suffered three tube failure episodes.I am  glad others are currently experiencing no failures thus far.