This game is F2P, for now there are no different versions, just the public one.
But buying the game \"Full StarMade\" will assure you will never have to pay for it again, steam codes, beta game, full released game, they are all included, like pre-ordering.
What you will get right now, is the Game Owner icon under your avatar to show your support for the game, and that you bought it, using the Registration Code you receive after buying the game.
Have fun,
-Mike