It is the difference in pacing that really set the two apart for me. In Dead Space, there are fairly consistent highs and lows throughout each chapter, giving the tense moments that much more impact because you do have quiet moments in between them. Dead Space 2 has far less down-time, and keeps you constantly moving forward to defuse or outrun the latest disaster. I also think the endgame of Dead Space 2 is much worse, thanks to that stupid invincible enemy that chases you through a significant portion of one of the final chapters. Contrast that with the fairly quiet end of the first game, where the planet is more about tying up the story than throwing waves and waves of enemies at you.

