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
Charles,  It looks like the fuse in my CSL is a T7AL, which is a 7A slow blow.  That seems like a lot of current for a preamp.  Is that what you ordered?
Bill,
My CSL  has only a single 3 amp slo blo in the rear panel. 7 amps is really a Hugh value. The Frankenstein uses only one 3 amp fuse per mono block. 
Charles, 
Hi Bill,
My CSL is an earlier model than yours.  I bought mine new in Oct 2009 and very likely Israel has made changes since then is my guess. 
Charles,