Both dramas portray main leads with Dissociative Identity Disorder. The FL in Hyeri has 2 personalities while the ML in Kill Me, Heal Me has 5 personalities. They both deal with different personalities falling in love and have extremely talented excellent acting!

Both shows are about the fight for succession of the throne after a relatively stable time! They have incredible political twists and turns & no one is really who they appear to be. The chessboard is literally constantly changing with each event. While NiF is a longer palace drama and features slower & hidden political machinations for the throne, Queen Woo jampacks most of that fight in just 8 episodes.

Both these dramas tinker with the concept of time and how that affects the actions of a person, including the biggest question of whether destiny can be changed, though the elements of time travel are more explicit in AALS than SoT. More importantly, they also both have really strong, decisive, and badass FLs who have "soft" and "star-crossed MLs to support them.

Both of these dramas have strong and decisive female leads. The FLs are also unconventional, and the story does explore some philosophical topics in the morally grey areas of how life is structured.