I find that Sins borrows a LOT from Gal Civ II, which is nice and what I was expecting. I especially liked the interface improvements over Gal Civ II. My only complaint is that Sins feels more like Total Anhilation (or some variant) in that I fall into the pattern of building a massive army to swarm over the map. The subtle difference between Sins and Gal Civ II was that the latter didn't have the ships automatically hostile against each other. Since you are automatically hostile (even public relations start off at 0) it makes other methods of victory mostly inviable. I always liked the options of winning through culture or aliances in Gal Civ II and I find it missing in Sins. Sure you can win through an aliance, but only after you build a fleet that scares the shit out of the AI. I guess I wish there was an option for the AI to start out neutral, friendly, or hostile such that other strategies of playing might be more plausible. And maybe, as they run out of space to expand, they start looking to you or neighbors as a better target over the pirates planets.
Anyone else play both games and have opinions?