They have different plot. But both drama has the same setting, a mystery of a student's death, and bullying.

I think both movies are great Korean thriller movie. Both movies also has some similarity in the plot.

Both dramas have some comedy mixed with some mystery in the story. Both dramas have an annoying-rich-asshole of a male main character and an uncompetent-naive-too conscientious female character.

both drama are centered around a murder and the story of the people involved with it. both also had family dramas inside of it.

Both dramas has similar plot, such as protecting important people. Both dramas have great action scenes too.

Both movies is about someone that getting framed for a murder and how they are trying to prove their innocence

Mohouhan and Confession of Murder have different plot but they have some similar things too, for examples: a serial killer, a book, and how mass media was involved in the case.

Both movies have similar plot, about a criminal terrorizing a broadcasting media.

Both movies are about zombie apocalypse, so the plot is very similar. But the atmosphere in this two movies are very different. Train to Busan is more like a tragedy-drama movie than a horror movie, while I am a Hero is an intense horror-zombie movie with a very few drama. I am a Hero has more violence, blood, and gore than Train in Busan.

Both dramas tell about a scientific criminal investigation team that has unique but talented members