Both are fluffy and the ML has two completely different personalities.
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Both are short length stories featuring a strong-willed FL and a ML with two very different personalities.

Both dramas have an extrovert FL and a very withdrawn ML who everyone thinks is odd until his relationship with the FL brings him out of his shell. Both are sweet dramas with no love rivals or breakups for the main couple.

Frenemies to lovers romance between the main couple, school setting.
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Both are set in school, and have a scene in which the ML rescues the FL from a fire at the school.
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Both dramas have a warm feel, a school setting, and an enemies/frenemies to lovers relationship between the main couple. FL likes someone else who only sees her as a friend. The ML in both seemingly picks on the FL who is annoyed by him, but when he starts to fall for her he falls hard and must try to get her to see him as more than a friend.

Both dramas have a school setting, a similar tone and pacing, and a frenemies/semi-antagonistic relationship between the leads that gives way to friendship and eventually romance.

Both are school setting dramas with a very cold seeming ML who secretly loves the FL and an endearing FL.

Both are a school setting with an initially antagonist relationship between the leads that eventually becomes friendship and then a gentle romance. Both have cute and perky FLs and cold outside but warm inside MLs.

Both are a school setting love story with similar pacing.
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In both, the FL sees ghosts constantly which has caused her to be reclusive, eccentric, and shut herself off from other people. At some point in the drama (all vs. one scene) the ML appears as a ghost but is not really dead, but the FL thinks he is dead at first. Both dramas have a very similar feel (Ghostderella is basically a condensed, shortened version).

Both are short dramas with a FL who sees ghosts and a ML who is either supernatural or has supernatural powers who can help her.