I own 2 sets of each of the Boston card decks, and only 1 of the decks is opened. Going by the release notes, it appears to be the 2005 deck. The set has Tom Yawkey and is TEXTURED ( little divots on the card ), the inside flap has 2005 copyright. The front of the box says: BOSTON, then has cards of Damon, Williams, and Boggs below that, with Baseball Heroes Playing Cards below the 3 players.
The other decks (that are unopened) must be the SMOOTH surfaced playing cards, that would have been issued in 2006. I own a smooth surface Lefty Grove playing card (so I know they exist). The box is also different: The front of the box says: Hero Decks Presents, then below that: Boston, then the cards of Damon, Williams, and Boggs below that, with Baseball Heroes Playing Cards below the 3 players.
Does that help?