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
I have about 20 hours on my Elrogs now. How many hours does it take to break in these tubes? I don't want to comment until I'm satisfied I've fully broken them in.
Dracule1,
In my case the Elrogs were very good straight out of the box( and just continued to improve). I'd say broken in by 40 to 50 hours. I use them in a power amplifier and you have them in a DAC, not sure if that is a factor.