Both dramas are about women who use their business to help the less fortunate.
Both dramas tells the story of how General Yi Dan (Yi Seong Gye) became ruler of newly form country, Joseon. The Great Seer focus more on the changes that lead up to the origins of Joseon. The Six Flying Dragons focus on how General Yi Dan who is crowned King Taejo shaped and molded Joseon with the help of his son, Yi Bang Won and trusted friend, Jung Do Jeon.
Both dramas are about strong-women who protect the innocent with their team of special experts.
Both dramas (Taiwanese version) are about a clutzy woman who gets the attention and affection of a powerful and important man. Both dramas are romantic, a bit sad, but caring and loving at the same time.