both are set in a similar environment which deals with auditing, taxation and accounting. also, both have a cool main character that does an investigation to take down his workplace because of corruption

an investigation involving a mysterious character that manipulates the police into doing his bidding. also to do with hypnotistism

both have fathers that were destroyed but the evil and greedy intentions of a businessman. there is also a lighter side to both dramas and it balances out well with the intense or melodramatic moments.

both the male leads are hitmen and both fall in love with a girl they are not supposed to and do everything to protect that girl.

there is a lot of misunderstandings. but eventually they are cleared up and the love the 2 main leads have for each other shines through

similar bromance feel. there is also a war in the background. deals with opium too. and a group that has been powerful for generations have to deal with a newly formed group that wants to take power for themselves

the female lead has a childhood trauma (raped by her father/foster father) that affects her to the present day
one of the differences is that in the revenge she thinks its natural, normal but in bad beauty, she knows its wrong

both deal with artefacts identifying which are real and which are fake. they also both have an investigation incorporated into the show

the main lead is chased by the police. his identity is hidden by a mask every time he is on a job.

a trickster thief who is stealing to take down a bad guy. who makes a fool of the police

the way they have set up the scene. sitcom-like show. the inner conflict of one of the main characters in figuring out he likes a guy. that and the weird sound effects that randomly appear in certain situations.

both has a main character that is hated and hunted by the world. both learn a secret fighting technique that can beat almost a other forms.