I'm looking to learn about Air Motion Transformer technology

FWIW, I took a peek at Wharfedale’s site and the Former shown in the exploded diagram of their AMT didn’t look familiar to me. It appears to be a yellow colored material and may possibly (I’m guessing here) be a more recent attempt to come up with a suitable Former material that performs better than Kapton, but is not quite as expensive to make as silk. Your guess is as good as mine on how good that one might sound.

In general, ribbon tweeters may sometimes have that last nth degree of uber detail or resolution compared to ATM's, but not by much at all. The difference may only make it a little easier to blend ATM's with the mid or woofer compared to ribbon. Ribbons tend to "beam" vertically more than ATM's - another thing that makes for easier driver integration for ATM's.

Ribbons by design have the ribbon itself that is replaceable. It needs to be replaceable because it can get stretched if played too loud, at which point it can lose performance or even break. The cost of a new ribbon is much cheaper than the cost of a new tweeter. ATM's don't have this problem, but they can take SPL's similar to ribbons without damage...but if you go Too far, you'll need to replace the whole tweeter - but, that's mostly only a problem if you're a metalhead or something :>)

I would imagine a Ribbon tweeter produces far more treble detail than any ATM. I usually don't hear any sound from ATMs other than a beeping when the buttons are pressed or the card is ejected. 

Dyslexia is known to strike at random, but it's rare that you see it so consistently when it does.

Ivan, thank you. You have really helped give me some knowledge to work with. I knew AMTs existed but have never confronted one. I like learning about what I don’t know.  

No sweat, I can answer all your ATM needs.... :>)