| If your worried about not knowing how to play you can always just get either the demo of the first game or the new one. |
I have not played GalCiv1 but from what I have read, game play is very different in GalCiv2. In GalCiv2, ship design plays a major part but in GalCiv1 is was all about getting larger hull ships.
Furthermore, game play has changed greatly in GalCiv2 since the Dec. 2005 Beta. In the Beta Mass Drivers were by far the best weapons; tech Mass DriversIII got you expensive weapons with value 4 and later in the tech tree Nano Rippers got you 8. Later it was removed and Nano Rippers dropped to 6 and then 5; armor has also been improved.
Prior v1.1, you would keep morale just high enough, say ~55%, to keep control of the senate. In v1.1, bonuses to production and population growth were added for high morale.
In v1.2, the first strike advantage was mostly removed.