I've seen both. They honestly didn't really grab me, despite my wanting to like them.
The thing is, other than the original Alien, horror movies don't scare me, and I find that 99% of the time if you're not being scared there's not a lot of point to the movie.
Event Horizon doesn't scare me. But I like it because it feels unique, has a wonderful design aesthetic, and features great performances from two actors I really like.