What is the difference between Extreme Condition and Colonies??? (Lost Planet: Extreme Condition)

Actually the question is: what is the difference between the editions of this game represented by Extreme Condition and Colonies??? My question arose after I literally just, after so many years, went through the Extreme Condition version of the game, and before that I saw a version called Lost Planet: Colonies. Hence the question grew. After all, I would like to know if I should play the version of Colonies and is there something that would distinguish this version from Extreme Condition? Well, are there any DLC storylines, or maybe additional modes? If nothing special, then you can go to Lost Planet 2.