Art posted the general differences on FB.. its not really anything most of us would worry about. Aside from the color and the "Paterson" name printed on it, the other differences were the location of the copyright stamp on the side/top. Im sure Art will post in more detail, but that was the jist i got from his FB post.
Art is a stickler for the exact version of things used on Fett so im sure this is a huge deal for him. I myself would love this same one if i had a display of parts that were used for Fett, but for a costume the new release ones look exactly the same in size and shape as far as i can tell.
Again im sure Art will be posting in more detail, and hopefully pics as well.