Confession

Going by the plot of the 2 dramas, they are not similar, but when I was watching Flower of Evil, I kept thinking how similar it is to Confession.. Later I found out that they have the same director and no wonder I felt that way.. Both are crime/suspense/thrillers but Flower of Evil has elements that can make you cry and it has romance as well.. Confession on the other hand does not have a romantic plot.. But both are very interesting to watch

Both are crime thrillers set in a law drama setting. As for the main leads, the ML in Defendant undergoes a more tragic life event involving himself, while in Confession the tragedy involves his father. Both are exceptionally well-written shows that really must be watched by fans of crime/law dramas. Confession, in particular, is very underrated and deserves more love!

Similarity: both have a character framed for a crime they supposedly did not commit and people working together to prove their innocence.
Both have the same genres and number of episodes (16) - thriller, mystery, law and drama
Both demonstrate the theme of corruption of those in society with power and injustice.
The goal in both of these dramas is to uncover and reveal the truth

Both dramas are dealing with crime cases and in both dramas we have an investigation duo where on of them has got a heart transplant that is connected to the people and the story.

A case involving the hidden truth behind the law prohibiting double jeopardy. When Choi Do Hyun was a boy, he had a heart disease. He spent most of his childhood in a hospital. He miraculously had a chance for a heart transplant. Right after the successful heart transplant surgery, his father was accused of murder. His father received the death penalty. To investigate his father's case, Do Hyun now works as a lawyer.

confession and adamas both have a father being in jail for murder. the sons of both dramas are uncovering the truth.

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.