ML is the result of human experimentation. Dark themes. While Duel has a more upbeat ending, neither is perfectly happy.

ML is the result of human experimentation and not treated as a human by those around him. Tragic and very sad ending.

The ML's personality is very similar in both. The main couple becomes each other's strength and support, helping one of them heal from a past trauma.

The ML is the result of human experimentation. Some dark themes and tragic, sacrificial ending of one of the characters. Very similar tone and settings.

Courtroom scenes and lawyer lead. Dark themes and mystery elements about a murderer and accusations.

Courtroom scenes and lawyer lead. Dark themes and mystery elements about a murderer and accusations. Some very unexpected twists.

Lawyer lead character. Courtroom scenes and cases. Main leads work together against the odds. FL rejects ML's interest in her at first.

Courtroom/legal dramas, lawyer main character.

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Lawyer defending other main character who is falsely accused of murder. Good chemistry between leads despite them initially seeming mismatched. Courtroom and crime/mystery elements. Happy endings.

Lawyers/courtroom drama. Main character with strong sense of justice. Both are kdramas, however MH has more of a "plot of the week" structure and Confession is very connected to a single story.

School setting. Themes of nostalgia and growing up. Main couple support each other even before they're couple. Happy endings.

Very different setting/plot but similarities in characters.

ML has a more unusual personality (more like a SML). It's not obvious at first who FL will end up with as she initially loves the other male character. FL is optimistic and very romantic.