If you ask me, both movies had a bad script and the acting was just ridiculous (except Lance Henriksen of course). Both stories are dumb (avp... predators who teach humans and use pyramids etc., COME ON!) in my opinion (I don't want to offense anyone, I can't stand the idea). The visuals are okay in both films I think. And the aliens do not look formidable or scary like in the original movies.
However I don't like any of these movies, I'll vote for Avp:r. Just because the predator looks normal, the vision mode is okay, and the fight scenes are not so past endurance like in avp (okay, Scar's jump attack against the queen was...cool). But just because of this, nothing else.