Both are masterpieces that have a completely different style and pace. The first was incredible for its time (go back and watch the trailer, it still stands the test of time and gives me goosebumps) and Scott was a master at building tension in that movie.
Although the second one is considered more action there is still plenty of horror in it and moments of dread, my favourite aspect being the “beep” on the radar. Cameron sure knows how to make a sequel.
Fuck yes, I love this kind of intense action where the humans are in some deep shit, instead of some one superhero type character dealing everything without a problem.