Both FLs have the ability to read minds, making them somewhat withdrawn from other people. Both MLs have a quirk about them that prevents the FL from knowing what they're thinking (FL can't hear their thoughts vs. their thoughts are in a different language).

Both have an office setting with co-workers or boss/employee, and a lead who magically and suddenly gained the ability to hear other's thoughts,

Both FLs have the ability to read someone's mind by looking into their eyes, a secret they hide. Both MLs have warm and cheerful personalities.

Both have a lead who can read minds by looking into someone's eyes.
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Both MLs are FLs' stalkers who then move in with her or next door to her and try to protect her from someone else in her life.

While different time periods, both are historical dramas in which the ML is engaged or married to a cruel/unlikeable woman who then ends up replaced by an identical woman with a very different personality who he falls in love with. Both FLs have a matching jade token (either to each other or to the ML) and their switch/initial replacement was when they were young.

Both are a Republican Era setting in which the intelligent FL teams with the detective ML in order to solve a series of connected murders with a recurring symbol/style left behind at each crime.

Both are mini dramas involving one of the leads entering a dream-like world in order to help their health, with the other lead soon entering the world to help them.

Both are mini dramas involving one of the leads entering a dream-like world in order to help their mental health, with the other lead soon entering the world to help them.

Both are Republican Era mini dramas in which the leads are married and secretly leading a double life as spies or assassins, each believing the other is not involved in their profession.

Both are Republican Era mini dramas in which the leads are assassins who are hiding their job from each other.

Both are mini dramas with rival assassins who marry each other, with each unaware of the other's secret identity.