emeraldarrows

Both FLs assume another (sister or stranger's) identity and marry the ML, who is a general, in an arranged marriage. He begins to suspect she's not who she's claiming to be.

Both FLs are poor and look identical to a rich girl and end up taking her identity. Both MLs are suspicious and antagonistic toward the FL intially.

Both FLs are poor girls who swap with a rich girl in an arranged marriage to the ML. TOD is much lighter in tone, though, and the rich girl is nice and not evil.

Both FLs are poor and swapped with a rich girl to marry the "dying" rich ML. Both MLs either recover or were never dying to begin with, and suspect the FL's identity is false. WCRG is much lighter in tone, though, and the rich girl is nice vs. the evil one of WTME.

Both are the same plot/story, just one is a vertical drama and the other a regular mini drama.
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Both are set in a small town and have a FL harshly treated by life and everyone around her. Both dramas involve the murder of an abuser and the outcome. Both MLs try to help the FL.

Both have an older woman/younger man relationship and similiar vibes. Zhang Xin Cheng is the ML in both dramas.

Both are Korean movies about alien invaders on earth.
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Both are set in the early days of WWII and portray the devastation upon a city and the characters who live there. Both have mostly tragic endings with a glimmer of hope in the few survivors.

Both FLs are downtrodden and badly mistreated humans who cross paths with the ML who is a supernatural being and falls deeply in love with her, protecting her from everything.

Both are mini dramas in which the FL is seeking justice and resolves to be the first female guard in order to accomplish her goal. Both dramas have a similiar dynamic between the leads.

Both MLs are morally gray supernatural beings who end up in a contract with the human FL. Both leads are reincarnations who were in love, with FL killed and ML taking his own life in the past, transformed into a non human. Both MLs will be erased if they kill and living human and at some point sacrifice themselves for the FL.