Both are dramas about supernatural creatures that have a campy style humor that makes fun of itself or the genre (vampire/zombie).

Both are chasing dreams type plots that have very cute couples. In both, the ML is very loyal and has a caring personality despite coming off as cold. In Symphony's Romance, he can't help but take care of the FL and the Rising Star Orchestra. In Go Go Squid he can't help but take care of his teammates. In both, ML refers to FL as a cat that has come into his life. He is also the mature one in the relationship while the FL is more youthful.

Both are business dramas about mediation and problem solving. In both dramas, the main characters have a mentor/mentee relationship. If you liked the cases part of the storyline in either of these dramas, chances are you'll like the cases in the other.

Both are feel good law dramas with very little of that evil chaebol/corrupt politician trying to manipulate things from behind the scenes. Both have a nice touch of comedy to balance out some of the seriousness of the cases.

Both are realistic family dramas about a family that has become distant over the years and bringing the family back together again. Both families have a similar family dynamic (a father with one daughter and two sons).

Both are about a family dealing with the loss of a patriarch/matriarch and the secrets that come out after their death. Lued Khon Kon Jang is more of a murder mystery involving a large family while All Is Well is more of dramedy about a dysfunctional family. Both touch on the preferential treatment of male siblings over female.

Both take place in the publishing industry. While Romance is a Bonus is about publishing books, Juhan Shuttai is about publishing manga. Both show the struggles the staff go through to publish, promote, and sell a book.

Both were shot using really long takes. One Cut of the Dead is a comedy about a zombie movie shot in one take. The Villainess has long takes shot to give the illusion that it was done in one take. The Villainess is much more darker though.

Both are supernatural dramas with a similar vibe and somewhat likable antagonists. They have similar themes of immortality and reincarnation. A Korean Odyssey is more on the comedy/action side, while Black Knight is more focused on the drama.

Both stories involve a crown heir escaping to Thailand and disguising themselves as a commoner to survive. In Thailand, they learn to experience an ordinary life and fall in love.

Both are Chinese sports dramas with a similar vibe. My Mr. Mermaid is about a disgraced athlete due to a former scandal while Lighting is about the son of a disgraced athlete. Both male leads are fighting to be #1 and win back their honor. My Mr. Mermaid has a lot more fluff and cute scenes between ML and FL.

Both are about grown men around their 40s who suddenly find themselves having to take care of a teenager. They are forced to grow up and mature in order to do so as well as navigate through the hurdles of their own lives. Old Boy is more of a slice of life. Both dramas have a similar vibe.