Taste is subjective and it can be trained, educated. There are also people who simply want a nice syrupy, sweet cup of coffee without strong acidity, sour fruits and such.
To give you an example if i’m going to use a darker roasted coffee let’s say saka bar (a blend with robusta) when pulling this coffee on 3 grinders the difference between the shots will be almost none, or too little to bother. Now if i’m pulling a super light roasted coffee (a Wendelboe filter roast as espresso) the difference between grinders/burrs will be much bigger even if I adjust my shots to get the best out of each burr.
So take everything that people post with a big question mark, and rely on the fact that posts are subjective and people describe what they experience with their taste and their preferences.
Instead of focusing on questions like if this is a taste upgrade from a niche zero, I would rather focus on, do I need an upgrade? i want another grinder, I want to try it, a friend of mine got one so I’ll get one too, I want to change my grinder color, it’s my bday and I want a gift, etc (find one of these reasons to buy it) dont go into trying to convince yourself that the taste is 1000$ better cause thats not how it works.
In the end this is a hobby, and hobby acquisitions dont need rational reason to buy stuff, you just buy it cause that’s what you wanted, period. No need to be convinced by someone.