After walking out into a void, for example, your sound will cut out (no sound in space, of course). I dare you to not shit bricks when out in one of these voids you turn around to find a necromorph, screaming in total silence directly behind you. Fucking horrifying mang :C
Indeed. I was enjoying the view of the planet, until out of nowhere one of them grabbed me from behind and started chewing my neck apart.
I also find Dead Space to be a more immersive experience, just from the number of ways you can approach the game.
Add in the unpredictability of the enemies, the weapon customization, and trophies/achievements and the replay value of Dead Space is very high. Heck, it's good even if you're just looking for a scare; I've never jumped so many times because of one game.