AE is AU with the Diamond Throne setting in full color.
What's new:
Three additional Evolved racial levels.
PLUS probably the errata included.
AND probably some minor stuff I'm forgetting.
If you're a completist, it's worth it.
If not, I don't think you NEED it, but it is nice to have everything altogether.
I had both and gave my AU to a friend, he now plays an Akashic in my Ravenloft game (!).
Try to find the PDF version when there is a sale on(?).
But I don't think it's worth 100$ if you already have it.
Patrick
