I’ll put money on that he can’t make an Atma-Sphere amp sound better
There is no "better", only different, when it comes to subjective value judgments. No doubt the tweak guru could place Ralph's GaN amp on a pile of horse manure and someone would say it sounds "better" sitting on horse manure than it does sitting on cow manure. But that "better" is only true for that listener and has no meaning to others. Opinions based on subjective perceptions are not facts! Your opinion about how amps sound is no more valid than the tweak guru's opinion to others- they all are meaningless outside a population of one. Of course, you aren't trying to profit off of your opinions and aren't claiming to possess "universal" knowledge...