Both are short length mini dramas in which a modern day actress FL ends up in a historical game like setting in which she has a guide who helps her/gives her tasks to complete, and falls in love with the royal ML who is supposed to die in the story.
Both are short dramas with a modern day FL in a historical game like setting in which she has a guide and must complete tasks to return home. Both MLs are royal.
The two dramas are an inversion of each other - one is a real world person entering the world of a historical game, the other is a person from a historical game entering the real world.