I am not sure, but the box seems to be different to the one on hol. If you look at the bottom of the box on ebay and the one on HOL, you will notice the lucas arts logo is in a different place and that there is no U.S Gold logo anywhere on the box. The Amiga sticker at the front is different too.
The same as what I said before, lucas arts logo is in different place, no U.S Gold logo and the Amiga sticker is different too.
I doubt the actual game/code/version is any different to other releases.