Flor do Mal (2020)

It has suspence, thriller, and unexpected twist of events.
The real villain in "He Is Psychometric" was always close to them just like "Flower of Evil".

My Fellow Citizens is like a parody of Flower of Evil.
-Married couple who suspicious of each other
-FL is a Cop and ML is criminal
-love vs law kinda
If liked MY fellow Citizens but want a more serious, mysterious thriller version watch Flower of Evil. The concepts are kinda similar.

Both are big suspense dramas and both the same concept of deceiving your partner in a way. Also, the main characters have quite the past.

Urashima Eiji is a university student and his father is a serial murderer. One day, he realises that he is suffering from a dual personality disorder and worries that his other personality may have committed murder. This leads him to begin investigations to find out the truth.

~ Adapted from the manga series "Shinai naru Boku e Satsui wo Komete "by Inoryu Hajime (Story) and Ito Shota (Art)

Similarity:
1-Both of them have serial killings in the past.
2-Both dramas are about to find the serial killers.
3- Both the main characters are cold and show their affection to only their loved once.

Difference:
1- In Flower of evil, Do hyun soo has a family and in Nobody knows, Cha young jin considers ko eun ho her family.

(If I add point 2 it would be consider as a spoiler so I won't add it. However both of these dramas are amazing. they are MUST WATCH!!!)

Both the dramas surprisingly has similar vibes and similar character development for Leads. Both the Male leads here on these dramas...think similarly!

They're suspenseful, crime-centered dramas that focus on the crime-solving process.
Both MLs are mostly emotionless men with a tragic past and ties to a serial killer.
The MLs change after getting into a relationship with a bright, stubborn female.
Both FLs have a job related to solving crimes.
Both dramas make you want to keep watching once you start.

Kill it is also a very suspenseful and thrilling drama, where the FL is also a detective that chases after an assassin, the ML.

Both dramas feature a psychopath who tried to pursue a life that others may deem to not suit them due to the fact that they had an inability to feel any emotions or emphatize with other people. Both dramas had the main character ending up misdiagnosed while still young and growing up having traits of psychopathy inside them. Both dramas had the presumed psychopath character trying their best to break away from the stigma people had of psychopaths in general as they try to lead a normal life.

They are both mystery/thriller with married couples. They both give the same vibes as both female lead try to clear their's husband's names.

They have the same type of right from the whole show. Although FOE is more romantic and lighter than SM.

Both dramas have quite the dark theme and are slow paced with emphasis on getting to know the characters, their life and emotions rather than action.
Both husbands keep secrets from their wives. "The World of the Married" focuses on the female leads character and how she deals after finding out the truth.

The ambient, the music, and even more, the way both drama unfolds, seem so similar.

In both drama, the main leads are accused of murder, thus their perfect-seemed life are about to get ruined.
They both have their spouse really believing them and supporting them when going through the hardship, and lastly but not least, when one of them hit on the other first (in the past), the drama makes time to explain how the main character tries their best to push away their partner, by telling them
"I do not have those feelings, Do you know what sort of a person, I am? " /
"I will never fall in love with you, and probably only use you as my fancy business card"

They both have similar concepts. Also, a serial killer related to the protagonist/antagonists.
In similar by they both related to law. Many of the characters both have secrets together. Both have a main chacater that you can't tell if they are good or evil.

They are both top rated dramas on MDL (currently at 9.1)
And both are masterpieces.

They both have very realistic and likable characters, especially the main cast!

They both include psychological elements and diving into the human psyche. and the leads are going their ways to protect their FAMILY! which is cherished highly and regarded as the most important thing in their life!

And most important of all! The soundtrack in both is simply fascinating and a treat to listen to! the sort you will tear up along it hitting those extra beautiful yet so melancholic notes! composed by the same people (Kim Jun Seok, Jung Sae Rin). The music in both drama is totally a piece of art!