from what I could see on the empty CE playfield at Expo sitting next to the other complete games, the only real difference between CE playfield art and regular/LE art is the swap in of Davy Jones in the center from Jack Sparrow. That's it.
For an extra $3000 cost, I would highly recommend there be more significant changes. Perhaps tweaking the background colors (ala GoT Premium) would be a good place to start.
Other than that, I think the game overall is a slam-dunk home run. First and foremost, it was fun to shoot. Absolutely beautiful theme integration, and killer presentation. Easily JJP's best game so far.
Later,
EV