Top down or bottom up? Just asking...

This is a purely theoretical question that I’m tossing out just to learn what folks might say.

Consider, say, Magico and Wilson Audio. Their top speakers are in 6 figures, but their ‘bottom’ ones go as low as 10k. Consider, say, Monitor Audio and Paradigm. Their bottom is very low 4 figures or lower; their top in the low 30s.

Now, wouldn’t it stand to reason that other things being equal a 20-30k speaker from Wilson or Magico would be better than the same from the other firms? The upper firms have all that top level technology to scale down, while MA and Para would be at the top of their game in the 20-30 range.

Obviously, there are other issues—personal taste being the most important. And room size and other components.

But ‘all things being equal’ isn’t the answer clear? What am I missing?

P.s. I am a very happy owner of MA PL100II, which I got half price used here at less than a year old. And of B and W CM9 I got 10 years ago. I’m just wondering…

Cutting to the chase...or actually, the end pile-up....

Taste driven by budget.  Taste will include performance in your particular space and what's upstream of it.

Budget is up to the depth of pocket involved.

It is as simple as that.
Better the cheapest room in a good hotel than the best one in a bad hotel.

I am sure that does not fully apply in this case, but it may be worth considering.

Having said that, I like the sound of lower-priced Monitor Audio speakers and just could not enjoy the sound of one pair of lower-priced Wilson speakers no matter how much better they would have been if both pairs were scrutinized piece by piece (accuracy, timbre, whatever). Magico is in the middle of that. So, I guess, preferences matter the most.
If you want the best lowest priced speaker of a high3nd brand I say look no further than the Rockport Atria II. It is the entry speaker into rockport but does not sound like an entry speaker. IMO it beats speakers from both wilson and magico in its price range. I would take the Atria ove lr a pair of S3MKII or Yevette. Add a pair of great subs that would put it in line price wise with a sasha daw and it will keep up with it as well.

The great thing about Rockport is that as you go up the line you just get more of the family sound. 
Best damn room I ever had was in the cheapest room in a cheap hotel.

I was caught at night in a Nevada sand storm, barely able to see the hotel's neon sign from the road. They were full, but they put us up in the lobby. Under the circumstances, best room in the state.

To the OP's point - most speakers can be dramatically improved by substituting higher quality but similar components. Almost always the crossovers can be enormously improved for a couple of thousand, for a sonic improvement that is not subtle. In ESL's the power supply matters quite a lot. And the big Magnepans can hardly be bettered at any price, but change the crossovers and you have a world beater.

I use a swarm of modified ESL's, and that's perfect for my tastes. 

I doubt if a lower priced exotic could be upgraded to the same extent. 
So I say keep your lower priced exotics and instead, do a DIY upgrade of a very fine product to a great one.