Time to Love (2015)

Its another version of Bu Bu Jing Xin which was produced earlier than Scarlet Heart Ryeo. It was a movie shortened compared to the C-drama or K-Drama.

Time traveling from modern times back into ancient times into a palace girl's body with princes' falling for her.

Time traveling from modern times back into ancient times through into a palace girl's body with princes' falling for her.

Both movies talk about the same family, it just "Time To Love" is about the 4th and 14th prince, while "The Palace" focus on 13th prince relationships.

They are both about the same story. Scarlet heart is the drama that is more intense. A time to love is the movie and is a lot more light hearted. Both are tearjerkers though.

In both movies the heroine travel to the past and found herself as someone already living in that era.