Both are Republican Era mini dramas with a love/hate relationship between the leads, one of whom is enacting revenge against the other for something they wrongfully believe they did.

One is the movie, the other the mini drama sequel.
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Both have a romance between a poor but talented chef who works in the palace kitchens and a royal. Both have a similar pacing and feel, as well as a palace setting.

Both FLs are talented but poor palace chefs, the MLs are crown princes or emperors, and the two slowly fall in love despite their differences. Both dramas have a palace setting.

Both FLs are talented chefs and the MLs are the royal prince, the two fall in love despite the difference in their stations, with the story set within the palace.

Both are Republican Era mini dramas in which the leads grew up in a (fake) sibling relationship. Both FLs are a bit naïve, younger, and willful, MLs are in some powerful but outside the law job (assassin vs. warlord). Both have a third wheel SML who the FL becomes close to.

Both FLs are from the modern day and magically enter a fantasy historical world with sects, romance, and tragedy. At least one person close to them from the real world later enters the world as well. Both FLs love milk tea and create or have a version created for them in ancient times.

Both are enemies/dislike to lovers couples in which one is warm/romantic and the other aloof. Both are about the FL entering a fictional world of romance.

Both FLs enter a fictional world of a novel where they fall with the ML who they are initially annoyed by.

Both MLs are poisoned and become "foolish" as a result. Both FLs are engaged to the ML against their will but end up falling in love.

Both MLs are poisoned and become "foolish" as a result. Both FLs are engaged to the ML against their will but end up falling in love.

Both FLs travel from the real world to a different one (the past vs. a book). The ML is magically able to read her mind.