Electro Harmonix Fat bottle 6CA7 vs. Sylvania original

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I tried a quad of the EH 6CA7 fat bottles in my Conrad Johnson MV-55 and am very pleased with the clear clean sound. (The rest of my tube set is early 1950's 12AX7 RCA black plates and Sylvania VT-231's. I had previously alternated between EH EL34 and JJ EL34L power tubes.)
Question: Is there a sonic advantage if I were to use actual NOS Sylvania 6CA7 fat bottles rather than the Electro-Harmonix's?
If so where would I hear the difference?
Thanks in advance for your input!

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Topic - Electro Harmonix Fat bottle 6CA7 vs. Sylvania original - Michael N. 18:05:03 04/17/06 (2)

Re: Electro Harmonix Fat bottle 6CA7 vs. Sylvania original - 6SN7GT 04:03:28 04/18/06 (1)

Re: Electro Harmonix Fat bottle 6CA7 vs. Sylvania original - Michael N. 07:53:03 04/18/06 (0)

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