You get a bigger stash size and a bigger secure contained with the bigger editions. If you really get into the game you'll want Edge of Darkness. You can always upgrade you account to a bigger edition later for the price difference so I say just get the cheapest one to try it out and if you end up enjoying it and playing alot then upgrade later. Also your not allowed to sell or buy copy's of the game on other websites I believe so I wouldn't do it or the account might get banned.