Rasen vs Ring 2
So, which one is the best ?
I say it's Rasen for reasons that I believe should be obvious but are not for so many people.
Ring 2 is for me like the American The Ring TwO, it wants to make more money on the success of the Ring so it tries too much to be scary without caring for the story too much. I find the story boring and pointless and it could actually have been a little more entertaining if it was scary, which it wasn't at all.
Rasen is for me the "official sequel". First : it's based on the original series of novels. Second : it's a great movie. Rasen tried to keep concentrated on the Ring story, not add pointless plots within it. Plus, the ending is the best ever, ever.