Sorry if I'm WAY behind, but how are they the same versions? if i buy it from gamestop does it get added to my steam account, and if so, why not just have given out randomized packs or something?
It is activated through your Steam Account. However the Pre-Order Bonus code will be in the box with the game so you will get the content that you are expecting.
As to why we could not just pick our Pre-Order bonus independent of the store we pre-ordered it from is another disucssion for another thread.
So, yes, the game itself is the exact same, the optional preorder bonus content is different.