Princess, Make Way (2023)

Both are historical/fantasy mini dramas in which the FL is able to or is forced to change her face, and she then marries the ML in the place of someone else.

Both are mini dramas in which the FL is a spy who marries the ML on a mission. Unbeknownst to her, the ML is also a spy who wears a mask who she has fought with before, but he is now pretending to be weak or out of his mind.

Both FL disguised as fake princess.

In PMW, she was ordered to do so in exchange for her freedom. Same with FP however, she was a thief.

The difference in how they execute it was in PMW, she was a master in disguise. While at the other, she looks like the Princess