Basically the same variant of the scissor mechanism as the Magic KB has (different from pre-2015 scissor keyboards) but modified slightly, as you can see over at iFixit (not that I agree with all of their sentiments, but I really enjoy the teardowns).
Phil Schiller also said they redesigned it based on the Magic Keyboard.
As to how it feels compared to the Magic KB, I've not compared them directly.
From personal usage I only have the 2016+2017 butterfly keyboards and pre-2015 scissor keyboard (Wireless KB and Unibody MBP) to compare with. When I tried the new 16-inch, it unpleasantly reminded me of the older scissor ones.
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On this thread alone, you've already seen several people including me (and OP) prefer the butterfly keyboard (some vastly) so I don't know why you would claim we all don't exist..
Oh, we know each other?
And dude, take a breath. I said to each his own so you do you.