What's common between these 2 is the lead character having to pretend to be someone lowly in order to achieve a certain goal.

Both dramas involved second chances in the form of going back in time to see the one you love be brought back to life, only for that other person to have no memory of you.

They both have a similar idea of assistants pretending to be their bosses. Except that "Fai Gam Prae" is more of a drama with a touch of dark comedy, while "Fun Fueng" is more of a romcom

They have basically the same plot. One disfigured character undergoes plastic surgery from an unknown benefactor, only for her to become a pawn to a grander scheme. She will have to endure the wrath of the people her look alike have wronged, only to win them over coz she has a good character. The look alike will return later when her luck runs out, and chaos ensues.