It's my understanding that the duplicate protection on preconstructed decks should allow that protection to extend to any art version of cards we own.

Using just the FFVII-themed Brawl deck as an example, I notice a few cards like Professional Face-Breaker, Rootbound Crag, and Furyborn Snarl, where I have a non-Final Fantasy version of the card, yet the Brawl deck in the store seems to act like I don't have the card at all.

This may have the effect of not fully reducing the cost of the decks, if I'm understanding Duplicate Protection correctly.

Thank you for your time and attention in reading this.