Both FLs are the empress, and they are their unborn child are betrayed and murdered. Their souls then enter another woman's body and they return for revenge, becoming closer to the ML who was their brother in law who loved them in their original life.

Both are historical dramas that involve the ML swept up in a war where the leads are separated for several years, with the ML fighting to save hostages held there as well as himself. Both FLs start out a bit naïve and high-spirited but mature greatly during the drama.

Both have an unusual form of time travel, prompted by one of the leads trying to save someone who was murdered, that causes butterfly effects.

Both are mini dramas in which the FL is a spirit/deity sent down to earth to complete a task. Both MLs have a "cold outside, warm inside" personality.

Both are historical mini dramas in which the FLs are spirits sent to complete a task relating to the ML.

Both are historical mini dramas in which the FL is a deity/spirit who comes to earth on a task relating to the ML who is feared by everyone around him. She quickly sees past his reputation and later falls in love.

Both are about a modern day FL who enters a fictional historical world, bonds with her new family there, and comes up with clever ways to support them in the countryside, all while falling in love with the ML.

Both are mini dramas with a rich person who ends up in the countryside and stays there for a while, learning how to live and falling in love with one of the locals.

Both are Korean fantasy/historical dramas in which the main characters have magical powers and a similar style of hair/dress. Both have strong wuxia influences.

Same story, different version. Both are based upon the manga with the same characters and general plot but have different interpretations of the story.

Same story, different version. Both are based upon the manga with the same characters and general plot but have different interpretations of the story.

Same story, different version. Both are based upon the manga with the same characters and general plot but have different interpretations of the story.