They have similar character.
Both the main lead is so smart.
The difference is song ci based on the real character of someone from the past

It have similar story all about Concubine. And the main female lead play in both drama as a Concubine

The story is quite similar. And the main lead is still zhouye. In that drama synopsis say she will be back to the past at the time before she died

It has a similar story that the mainlead back to the past after death to save herself. She suddenly wakeup back to the past

The story is quite similar about a support role become the main role in the story. In the romance of tiger and rose the writer from the modern world come to her story world. She was suppose to be the support role but eventually became the main role and make the male lead in love with her instead of the female lead in her story