If it's anything like the two versions of Dean Man's Chest they came out with last year, the main difference would be that the single disc version would have only the movie, audio commentaries, and bloopers.
The two-disc version would have everything from the first disc, plus on the second disc you'll see all of the making-of documentaries, deleted scenes, and short film, plus much more.
Feature Film Presentation
Bloopers of the Caribbean hilarious outtakes of cast and crew
Anatomy of a Scene: The Maelstrom a detailed breakdown of one of cinema's most complex and impressive action set pieces
Keith & the Captain A revealing look at the dynamic relationship between living legends Keith Richards and Johnny Depp
Tale of the Multiple Jacks an in-depth look at the mind-blowing FX that went into creating multiple Captain Jacks
Hoist the Colors reveals the inspiration for the "Hoist the Colors" original composition
Masters of Design five individual documentaries highlighting the talented design teams behind this immense production
o #1: Jim Byrkit and The Map
o #2: Crash McCreary and the Krusty Pirates
o #3: Rick Heinrichs and the Singapore Set
o #4: Penny Rose and the Captain Teague Costumes
o #5: Chris Peck and the Pirate Code Book
Inside the Brethren Court a closer look at the legendary Pirate Lords and theircostume designs, origins and unique personalities
The Pirate Code: Revealed explores the pirate code and the history of piracy
The World of Chow Yun Fat a look at the man behind devious Captain Sao Feng, international sensation Chow Yun Fat, and his meteoric rise to fame
The Pirate Maestro: The Music of Hans Zimmer meet the renowned composer who created the film's rousing score
"We believed in our idea - a family park where parents and children could have fun- together."