The Survival Edition, pictured above, includes a hardcover art book and issue one of The Last of Us: American Dreams, complete with an exclusive variant cover, both from Dark Horse. It comes with a steelbook case featuring Ellie and Joel, and includes the Sights and Sounds DLC pack. Sights and Sounds comes with the game's original soundtrack from Oscar-winning composer Gustavo Santaolalla, a dynamic theme for PS3, and the Winter Joel and Winter Ellie PSN avatars.
The Post-Pandemic Edition, shown below, is available only at GameStop, and it includes the steelbook case and American Dreams comic from the Survival Edition. The bulk of its price seems to come from a 12-inch statue of Joel and Ellie from Project Triforce, which has an estimated retail value of $200. Post-Pandemic comes with the Sights and Sounds DLC and the Survival multiplayer DLC pack (that's not confusing), which has bonus XP, a melee booster, in-game currency, customizable items, and bonus Ellie and Joel skins once the game is completed.
These both differ from the UK special editions of The Last of Us, also announced today.