I was one of the firsts to purchase and play the first GalCiv, and I'm a huge fan of turn-based space strategy games a la Master of Orion, but I have to say that Sins of a Solar Empire is by far the better of the two. Amazing fusion between the genres: all the action, none of the tedious micromanagement. All the strategic thinking and resource management, none of the 'pass the damn turn already!' syndrome in mid-late games that a bog down turn-based games. Really excellent.
Improve the diplomacy, and you've got yourselves a pure classic in years to come.
