emeraldarrows

Both are about the FL switching identities with another girl which results in her becoming the ML's bride. The two end up falling in love.

Both have horror elements/a darker tone, an immortal ML, and a reincarnated FL who is being chased by a monster/monsters.

Both dramas are dark thriller/mysteries in which the main characters are a couple and their young daughter and (one of) the SML(s) is a newspaper reporter. Both dramas have a lot of misdirection/red-herring which keep you guessing what's happening/who the villain is, and both have common plot elements of a killer in a raincoat, a car accident, and amnesia.

Both MLs are allergic to being touched by either all people or just women due to childhood trauma. However they are only immune to the FL who is in disguise when they meet (as a man vs. as a robot).

Both MLs have allergic reactions to women but are immune to the FL. Both are historical mini dramas.

Both have star-crossed lovers as the main couple with a one-sided love triangle between the ML who works in/ends up working in the palace, the high-born but unpowerful FL, and a somewhat foolish and childlike emperor with a violent temper who was childhood friends with the FL and is now obsessed with her.

Both are mini dramas with a spy FL.
............................................................................................

Both are historical mini dramas with a general ML.
................................................................

Both are historical mini dramas with a general ML.
................................................................

Both are about the ML and FL who were together in high school separating due to the ML causing a misunderstanding. Years later the two unexpectedly cross paths. Both dramas have a similar feel, being character driven and also focusing on the other people in the main couple's lives (like parents, etc.).

Both are mini dramas that jump back and forth between the past and present with the ML and FL in high school to their present. Both have a quirky end of each episode showing a different POV .

Both are mini dramas with a possessive/violent ML and a FL who assumes a false identity and must deal with her abusive family/people who took her in.