I think it is pretty normal that potential buyers want to know...from every manufacturer....what changes in the sound you hear as you move up the product line....and maybe this is a little bit easier to answer with speakers than with amplifiers?
You may switch from a 2Cherry to a Golden Cherry and in your system and the result is that the low end has a little more definition but you have lost a little bit of spaciousness...why? Maybe its your specific wires, preamp, amp and speaker combination....and maybe in my system, I can't tell any difference whatsoever.
SO....to my way of thinking, if you are really wanting what YOU perceive to be the best sound for your system, you have to try several Cherry amps and keep the one that gives you what you are looking for...and realizing that if you change speakers, change preamps, etc., you might get a different answer.
Now, as for my story. I owned a Parasound Halo A23...great reputation for great sound and beautifully crafted and built. Good low end, spacious 3d sound, etc. I wasn't looking for a new amp but curiosity got the best of me and I decided to buy a 2Cherry just to see what all of the "tube sound, solid state low end" buzz was all about.
I hoped the 2Cherry would be more dimensional than the Halo, it seemed unlikely but that is what I was listening for. What I heard, right out of the box, was "shocking" and completely unexpected. The level of clarity, music aliveness, and tone was just at another level. At that moment, I didn't even care about the dimensionality because I was hearing music with a degree of realism that I hadn't experienced with my system.
And, as I have previously written, over the next couple months, I put the Halo back into my system several times and after a few hours, had no choice but to go back to the 2Cherry....the Halo is now gone for good.
As a result of this, I have a greater understanding of what Tommy is saying....you reach a point where the only way to know if you will appreciate the "change" that a different piece of gear will bring to your sound vs what you already have is to try it.