Ah, I see what he meant (kinda), and I kinda expected this.
AEK64 is a layout. It's a 60% board based on the old Apple AEK boards, but in a 60% size. Most of the time using Hasu's Alps64 PCB, and whatever case you want (Fjell, for example).
Someone recently ran a closed group buy of a 60% case, called the AEK64, which I think is where the confusion came from - I've seen this a few times already, actually - after seeing that new steel case, because the case is named after a layout that already existed..
ETA: that is to say, one could build a an 'AEK64' keyboard, with or without the new 'AEK64' steel case, and it would still be an AEK64 keyboard. If that makes sense Kawasaki?