Both deal with undercover crime investigations. Similar gritty and gripping stories. Cruel City was a little less organized with its plot and The Worst of Evil had a better setting/cinematography overall, especially being set in the 90’s. But if you liked one, you will probably enjoy the other.
Similar feel with girl falling in love at first sight with boy, then slowly but surely winning him over. Tong Nina is a better heroin though, since she’s a lot smarter and more capable. But this story is just as sweet and satisfying.
Similar feel: two people who are tied together due to a shared tragedy in their childhood. There is also some similar corruption involved. It's a little more "makjang" than "He is Psychometric," but if you liked one, I think you will enjoy the other.
Very similar vibe, especially with the supernatural elements...although the relationship dynamic is somewhat different.