The anniv. with EMP stock tubes:
a little bit more fuzzy than stock tubes,
a little bit more thick than stock tubes,
a little bit slower but still fast,
bass is a little bloomy but it is controlled,
high is less extension,
still provides energy, and sound is powerful,
do NOT have the warm and sweet as EMP's with this stock tubes,
I prefer this tubes with EMP.
The EMP with anniv. stock tubes:
mid and high is more clear and bright than with its stock tubes,
still no high extension compare with anniv.,
lose the extremely warm and sweet,
still less energy than anniv.,
bass is uncontrolled, bass is less than with the stock tubes,
I prefer this tubes combining with anniv. And I prefer the special warm and sweet that EMP with the stock tubes provides.
If the anniv. with stock tubes is worth 10 point, I will vote when it goes with the EMP's stock tubes a 6.5 point.
If the EMP with stock tubes is worth 10 point, I will vote when it goes with the anniv. stock tubes a 10 point also, or even lower.
I hope I didn't confuse you guys...
AS you can see, the improvement of the anniv. is not just about the tubes. I may say that the improvement is benefited from tying in the tubes and the rest parts of the amp. The anniv. can NOT provide the same warm and sweet as EMP, although it's with EMP's stock tubes.
PS: testing are under 1616M, tara air 1 cable and AD2000.
