Killzone 2 is way better, but the war between Vekta and Helghast is based on a future cold war in Killzone SF. While Killzone 2 is based on a future world war 2 kind of war. The contrast between Helghan and Vekta is one of the best thing about the game. It us a shame though that after the fourth level the game feels rushed.
The story if SF is awful compared to Killzone 2 which was for it's time a more impressive game than SF. The story of KZ 2 and the cliffhanger at the end where also way better as was the feel of the guns, the sound, the missions and everything really. Killzone 2 was unique because of the above, SF had the drone play but it made so many mistakes, it wasn't great barely above mediocre really. But the Vecta levels where a nice TECH demo so it did it's job.
Please excuse my (probally) poor grammar
