Recommendations

Both dramas have people with unusual powers and mysteries on them. The themes are similiar and include both romance and action. Perfect choice if you're into this kind of dramas!

Nirvana in Fire also incorporates elements of espionage, martial arts and Intel profiteering. Both MCs bear similar characteristics of defining tragedies in their past and play crucial roles as strategists to reform the government, but SFD's Sam Bong is more 3D and realistic.
In terms of acting, suspense, political intrigue, character development, plot twists and character range, Nirvana in Fire falls short in my opinion. SFD is more willing to embrace and ride unpredictability in plot execution which is something that's very rare, SFD is also more lively in terms camaderie and comic relief.
Final verdict from a personal POV, Nirvana in Fire is a snorefest with bland characters and a rating of 9.1, six flying dragons is an all round masterpiece with a rating of 8.8, the contrary opinions are overwhelming so give it a shot.

Both dramas talk about revenge and justice.
It has a hint of black humor and a crazy protagonist.
Both dramas have strong women who go to great lengths to say what they want to do what they want.

Both dramas deal with illnesses and how to cope with the repercutions thereof in the ideal bl world. The directors also manage to avoid usual irritating sound effects, comic relief effeminate characters, evil females. They are definitely what bls should be like nowdays: quality production with a thought out story!

Cornered mouse is more mature, but it is also struggling with feelings and it also comes from a manga. If y like kieta, y have to see the cornered mouse also.

Both are about the professional life and struggles of modern script-writters.

Both have a girl, which talks to a ghost, who was once in love with her and revolve around making peace with him.

Both have characters which closest people aren't actually alive and present. They involve that person's sad story from the begining to the end of the show and talk about receiving the right amount of psychological help and love + support from your friends and family.

Somewhat slice-of-life dramas which involve:
- young gay man and his love life struggles + the young woman which is closest to him;
- the friendship of 3 + 1 girls (which knew each other since school or colleague..);
- 3 girls and a guy living in one house to help the female protagonist's emotional and financial problems (and their own life);
- a friendship between 3 men;

It involves a few female friends and their life and career desicions. Looks throught the girls different personages and the different way they tend to resolve their problems.

Both have a male protagonist who is a pianist (and was a child prodigy). The female protagonist is also a musician, but lacks the talent the male protagonist have.

Very different in concept, plots, even genres. but how the leads' psychology create a new personality—which change their lives in process—without them even realizing it is somehow similar. Might be too soon, but we'll see if it really is the case.

Children of nobody points out the psychology, while Secret Forest is more to the politics, but I did spot some similarities
-Children of Nobody is much darker than Secret Forest but the crime cases occurred bcs of the quite similar 'perspective' that the character had, which make them be in ambiguous side (good/evil).
-The collab between ML and FL that are from different job.
-both are somehow melancholic on its own way

The plot is very much similar with the FL having two very different sides to them. It is a very short drama so you can binge watch it.

The two are set in a convenience store, and there develops a sweet romance.

"Backstreet Rookie" is a 16 episode drama with a duration of 1 hour, so here more stories develop. It's not just romance.

Meanwhile "Convenience Store Fling" is a web drama with a short duration, which focuses on romance.

Both are dealing with palace politics wanting more with each episode! The only difference is that Rise of Phoenixes has a bit more of a love story attached to it.