I'm sure everyone thinks differently based on his/her experience.
My experience was based on owning Revel Salon2, B&W 802D2, Linkwitz Orion 3.2.1, Philharmonic 3, KEF 201/2, & TAD 2201 in the same room for over a year.
What was your experience based on?
Plenty, plenty of stand-mounts that have rolled through here 3,4,5 at at time.
If you didn't hear a difference in the treble and midrange in the speakers you mentioned, something was amiss in your chain or elsewhere.
We don't even have to get into higher end speakers to hear that there is a difference. Just take a look at the original Pioneer BS-22's vs the original Philharmonic Audio AA Monitors (both speakers had no bass output to speak of). Same enclosure and same mid woofer used in both. All Dennis did was change the tweeter, add some fill and revise the crossover and the treble and the midrange were completely, totally and undeniably different. No level matching would ever make them the same.
If you can't hear the difference in treble & midrange presentation between speakers, I can't help you.