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