Saw this come through on one of my feeds today. It looks like the main differences are the DVD and Digital copies, the dragon egg paperweight, and a disc of the first episode of Season 2. The pre-order price is $99.97 through HBO.
http://store.hbo.com/game-of-throne...f-thrones&ecid=SMM-HBO-00442&pa=SMM-HBO-00442
If the egg is your thing, you can get it without buying the collector's set for $45.
http://store.hbo.com/game-of-throne...1642&v=hbo_shows_game-of-thrones_collectibles
http://store.hbo.com/game-of-throne...f-thrones&ecid=SMM-HBO-00442&pa=SMM-HBO-00442
If the egg is your thing, you can get it without buying the collector's set for $45.
http://store.hbo.com/game-of-throne...1642&v=hbo_shows_game-of-thrones_collectibles