For me, it has to be “Old Boy” which is originally a Korean movie but the US version sucks so much that it remains incomparable. Another contender is “The Ring” again a Japanese movie (the ending differs between both versions, as the original one refers to the protagonist’s father sacrificing himself but the remake states that the cursed tape is being sent to someone else, passing the omen towards another stranger).
So, both and not Vanilla sky. They used Penelope Cruz in both films, but swapped out the guy in the Spanish version for tom cruise and it’s otherwise the same movie. Tom did a great job but it was uneeded unless you just loathe subtitles (y tho)