The Hunter Edition is the same price as the normal edition, but it has a few bonuses:
Discover the best Game Key offers, compare prices to download and play Crysis 3 - Hunter Edition at the best price. Compare CD Key prices from merchants all around the world. Activate CD Key on your Origin client to download the game and play in multiplayer.
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Add the CD Key to your Origin account, the game you bought will be added to your library. Now you can download Origin PC video games for free at any time you want whenever you install Origin client.
Launch Origin platform on your PC and log in to your account. Click the Origin logo in the upper left corner of the main window, then click the Redeem Product Code button. Enter the game cd key you have received after purchase and enjoy your game.