@jpeters568.
I’ve brought this up many time to help illustrate my point. Take two capacitors from two different manufacturers, exact same specs, exact same measurements. Sound different. Do the same with two tubes. They sound different.
Shouldnt matter, I agree, but yet, it does. Why? Don’t know, don’t care. If I replace something, or change something up, I live with it for a while. Then I consider what is missing, or what there is perhaps too much of. Then I make a change again and listen for changes.
If you are watching a film of poor video quality, after a little while you don’t notice that bad quality so much. The mind compensates - especially if it’s a film that has captured your interest.
Same holds true for sound. If I’m trying to tune a bookshelf speaker after having been listening to electrostatics, it’s going to cause some problems. So, I live with them for a while, let my brain adjust before I listen critically and attempt to make changes.