Both involve someone from the future time traveling to the past to try to prevent the FL from her future fate of a horrible marriage and her death. Both dramas have a similar vibe and relationship between the main characters,

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Both dramas are mystery/thriller genres with a FL who has the supernatural ability to hear when someone is lying.

Both are about one of the MLs who was adopted having a long time, secret crush on his (non related) brother.

Both are mini dramas in which the MLs are allergic to people, order a robot, and the FL ends up replacing the robot.

Both MLs are allergic to people, order a robot, and the FL ends up replacing the robot.
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Both are mini dramas in which the ML swaps identities with his identical twin brother.
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Both leads have complicated identities which put them at odds with each other, and ML is in possession of something the FL needs that if she takes it will cost him his life. Both dramas have ambiguous endings with the leads within the world of a painting.

Both FLs are betrayed by the man they love and die tragically, only to find themselves in the past. They become close to the ML, someone they knew only briefly in their original life.

Both are more serious BLs in which one has a difficult life. Both have similar vibes.
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Both are set in school and about the MLs creating a team to make a film in order to impress a girl he has a crush on.