Both dramas are set within the world of a story and the FLs must change the story/their character in order to escape their tragic fate in the plot.

Both dramas are set within the world of a story.
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Both dramas are set within a fictional story world. Both FLs are supposed to be the evil SFL in the story, but must change to survive.

Both are short length dramas with a visually impaired ML whose vision/color-vision is restored by the FL's kiss/proximity. Both MLs are CEOs of a perfume company who have designed a special perfume, and the FLs approach them with ulterior motives. The main couple has met previously when the FL saved the ML from a traffic accident. Both dramas are very similar in plot and tone.

Both are short length dramas with a half demon/half human ML and a FL who behaves very differently toward him than he's used to (no fear or power over him).

Both dramas have a similar feel and world-building, both are historical fantasies. Both couples are non human.

Both dramas are light and fluffy historicals with a non-human ML and an endearing FL who has come from another place (heaven vs. the real world).

Both dramas have a matchmaker FL and a non-human ML with similar world-building and a more fluffy tone.

Both are short length dramas with a demon lord ML.
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Both are short length dramas with a demon ML and a quirky, endearing FL.
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Both are short length dramas with a bickering couple, a FL of higher status than the ML, and crime-solving. Both are historically set and have moments of humor.

Both are short length comedic historical dramas featuring loveable bandits engaged to upper class people.