I haven't seen the ones mentioned but overall, I think foreign horror films are more well done than american style horror movies. They (foreign horror) have more substance or depth to it rather than just the normal gore/sex/violence. It's not the usual psycho killers chasing after a bunch of people for some odd reason. The storyline is so much better that even the american companies are doing remakes.. like The Ring (based on Ringu) and The Grudge (based on Japanese movie Ju-On). There's going to be "The Grudge 2" which I think I'm skipping altogether. Foreign horror films just do a better job of scaring the crap out of you.
My favorite foreign horror movie would have to be
A Tale of Two Sisters. Talk about being scared and a movie with a wicked twist.
P.S. I'm not really a major horror fan since I get the images stuck in my head after seeing it and those turn into nightmares. x.x