At the risk of sounding like a troll, I have to say this:
Beyerdynamic is in it for the money. As an owner of the 770LE I was baffled why they didn't make this a regualy stocked product. They sound much better than any other closed can anywhere near this price range, so only making 4000 sets seemed... a bit silly. Looks like BD has figured this out and are now launching a regular version. Reviews will show if they sound as good as the LE. For the sake of consumers and BD shareholders, I hope they do.
Beyer told me this months ago already. They're the same, shouldn't be any difference in sound.
I'm happy to own the AE, "Only" paid 143€ too.