Both MLs have the FL pose as their sister due to her identical appearance and to enact his plot. Both MLs wear glasses and have an initially aggressive personality until they fall in love.

Both are about the ML in the future trying to prevent the FL's death in the past by connecting with her through her cellphone.

Both have the same general plot and similar scenes, with the M L hiding his past from the FL who is his wife and in law enforcement, as all the while she begins to suspect him of being a murderer. SOY shifts the setting to ancient China, while FOE is modern day South Korea.

Both involve a commoner and a royal of opposite genders switching bodies and then being forced to navigate each other's lives, bickering and trying to swap back.

Both are historical mini dramas in which a royal lead swaps with a commoner/bandit lead, resulting in them having to navigate each other's lives all the while bickering.

Both are historical mini dramas with a FL who is a strong general entering into an arranged marriage with a weaker, rich ML.

Both FLs fall in love with a man who betrays them and causes their death in a fire. The FLs then find themselves back in time and resolve to change their fate, which leads to them growing close to the kind ML.

Both are short BLs in which the human lead discovers his cat has transformed into a human.
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Both are BLs about the relationship between one of the leads who is human, and the other lead who is a cat/human shapeshifter who begins living with the human.

Both are BLs about the relationship between one of the leads who is human, and the other lead who is a cat(or dog)/human shapeshifter who begins living with the human.

Both are censored Chinese BLs that have a relationship between a human and a cat shifter.
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Both are censored BL stories about a human and the cat shifter he brings home.
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