Elrog 300B vs Takatsuki 300B tubes

As you may have seen, one of the posters in here, Charles1dad, previously used the Taks as his reference before switching to the Elrogs... in Coincident Franks though, unfortunately for your information gathering.

P.S.  Charles, are those Elrogs still hanging in there after the amp mods?

Hi Cal,
As you noted I  did the amplifier cathode  resistor modification and I’m on my 3rd pair of the Elrogs. One tube has recently failed and the other is working fine. My conclusion is that the Elrog 300b despite its superb sound isn’t a good choice for the Coincident Frankenstein MK II. I’d recommend the Takatsuki and EML XLS as better companions. The EML XLS especially is an ultra robust workhorse tube that seems ideally suited for the Frankenstein’s particular demands. This tube is rugged, exceptionally reliable and sounds truly excellent with this amplifier.

In absolute terms the Elrog is a bit better sounding and has a "more" organic character. However the "bulletproof" EML XLS makes beautiful, dynamic and very engaging music without question. This is a top echelon 300b tube in my opinion. In the proper amplifier the Elrog is brilliant but it is seemingly too delicate for long term use in the Frankenstein. This is my conclusion and others may disagree.
Charles,

Charles,
Sorry to hear about the persistent failure of Elrogs in your Franks.  Mine are still doing OK, but I am probably only getting 2-3 listening sessions in a typical month.  If the heat doesn't break soon, the listening may increase as the hiking decreases.  I do wonder if my use of the PS 10, using115 V and soft start up, will lead to acceptable service with the Elrogs.   However, if (when) they fail, I intend to go to the XLS tubes.  We have all been quite patient with Elrog, but the premature failure rate has been unacceptable. 

Hello Bill, 
It's surly conceivable that your PS Audio 10 could provide a definite positive effect. I gave it my best shot but with the 3rd failure I recognize that enough is enough. Your fate may be different from mine. 
Good Luck, 
Charles,