Same era, similar leads and the first part of Fall In Love's plot with the sisters and childhood engagement is very similar.

The setting with college love and separation and new story arc as adults is the same, also the way they are in college as the FL boldly pursues and the ML seems indifferent. The characters of My Sunshine are even mentioned in L&P and one of them makes a cameo. However the adult story is very different, in My Sunshine everything has changed and in L&P it's just the same stuff over and over. I liked My Sunshine a lot more.

A naive girl from another world chases the cold guy and makes him totally in love with herself. Both are super funny and have lots of kisses, especially Dear Herbal Lord has many good kiss scenes.

There were many small things in A Business Proposal that reminded me of my all time favorite: The Greatest Love.

There is something similar in the male leads of these dramas, and the way they let the FL's play them. Both dramas are funny and an emotional roller coaster ride, making you gasp your breath.

Both are simple and beautiful love stories with similar feeling. In both main leads are beautiful people and the female lead is an actress and more lively, the male lead has an occupation outside showbiz and is more quite and very calm. They treat each other well through the whole drama.

Both have:
- action, crime & romance combined
- infiltration, and hence complicating relationships between the main leads and the villains
- lots of plot holes / illogical stuff
- strong romance and hot scenes between the main couple

Both are dramas about a sensible couple, who after they get together have a steady relationship without misunderstandings or fights, they just treat each other very well. Both also feature gaming and have the same actor as ML.

The two have basically the same love triangle, with same characters:
- FL is a nice woman who tries to treat people fairly. She works hard for her career in front of the camera to provide for her family. She is played by the same actress.
- ML is a moody guy, sometimes a jerk, who has health problems with his heart/chest (the same word in Korean). He also works in front of the camera, but in better position than the FL. He is first annoyed by FL but after he has accepted that he loves FL, he loves her very powerfully, desperately and unconditionally.
- SML is "the perfect guy", whose only real fault is that he is not the ML. He works in some other industry than the main couple.

The storyline is different, but because of the characters and the feel I'm pretty sure if you like one of these you will also like the other.

Both dramas have a very similar setting and vibe. The female lead is a journalist in both, while the two male leads are a prosecutor and a lawyer, who have gone to college together and have prejudice against each other. In both they have a magical way to know and change the future, which they try to use to solve cases and prevent deaths. The chemistry between the main leads is also similar, a bit goofy and heart-warming.

Zhao Lusi keeps starring these dramas where she is a modern girl appearing in an ancient, magical country. I think Tiger and Rose was much funnier but Love Better Than Immortality had better romance/main couple/male lead.

The story between the main leads is similar is so many ways that I can't write it here without spoiling. If you were moved by the main couple in one, you will like the main couple in the other too. The side characters and their relationships between each other and main leads are mostly different.