I encourage you to reserve your judgement! You've told us what you want to see in order to be convinced, so we'll bring it to you.
Terminus differs from most of these current 'space colonization' games in a lot of ways. Maia is really a god-game like Dungeon Keeper, and it's an awesome-looking one at that! While Unclaimed World seems to have a very zoomed-in focus on characters. Terminus pulls further back than both of them and deals with buildings and the broader policies of running a colony. Less focusing on the details, more on the bigger picture.
You're right in that there is some influence from Alpha Centauri thematically but mechanically there are major differences.