Similar in: vampires stories, predestined love, love story over centuries, modern setting with fantastic creatures.

Similar in : interior conflict that ruined the country, usurpation by the desire of grandeur hidden under pretense of saving the people, the way of the sword chosen above anything else. Distinct filming, strong acting.

Similar story for: love loyalty emotions, plot at the palace, unfulfilled love, devotion, great endurance to grinding, also Tae Woong Uhm in equally moving role.
Moves you until you cry a river. Extraordinary performance of the actors.

Similar love story, deep, intense, devoted emotions, painful life stories, plots at the palace, always someone for their lives, tragic end. Moves you until you cry a river. Extraordinary performance of the actors.

Similar love story, misunderstandings, sorrowfull love, great feelings, both on enemies sides but fall in love, tragic end. Similar Romeo and Juliet plot.

Obviously the similarity is about the theme, a robot. Apparently the male protagonist is an actual robot and falls in love with a human girl.

In both dramas, the male protagonist is in love with out of reach girl, either a supposed robot, or a ghost girl. Either way, both wonderful, romantic heartwarming and innocent. All about true love here.<3