I had never heard of Gal Civ nor MOO, so when I saw that there were two "Civilizations in space" games at EB games, I chose MOO 3.
I so should have chosen Gal civ.
I only played the demo of galciv 1, but I found some things to be a bit annoying. Now that they're fixed in galciv 2, I'm having much more fun with the game.