Iljimae

Both dramas have both the main male leads as brothers but both characters don't know that they are brothers. Both the father and mentor of the main character for both dramas was played by the same actors. Finally, both dramas are about avenging the death of a father, but also becoming the true king that the people of Joseon deserve.

A remake of this drama. Both Lee Jun Ki and Jung Il Woo portrayed their roles perfectly and they both are very hot <3

Both share a FL running an inn/boarding house, a ML who lost his father which causes him to hide his identity, & a family secret.

Both of those dramas are similar, deciphering into the Joseon Era and explaining the male lead as they have the same rags to riches journey with rising to power and how they became to be.