First Sound vs Aesthetix

How does the First Sound Presence Deluxe 4.0 MK II with Paramount upgrade stack up against the Aesthetix Callisto MK II Signature?
First sound, quiet and reliable. Aesthetix more of a euphonic sound. It depends what exactly your looking for in a system and what you would be mating with it as to which would be better.
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Tvad: That is exactly why I own the Callisto Sig. And with a careful change of her tubes, she quiets down.