Difference

Graceful as a feather the adopted lady of the Otsu house the perfect noble lady of the empire, the perfect candidate to become the crown princess, a perfect lady to rule the empire with the crown prince. Lived her life in peace

She was begger her beauty caught the attention of the head of the Otsu house, he adopted her and train her to become a perfect lady. Not only did she have beauty, she is also a prodigy, she was nicknamed the empire's gift. Her aura is Gentle, Warm, and imitating (If she wanted to)

After being poisoned by her adopted sister two days before her wedding with the crown prince she found herself in the body of a baby named Gei Ming

She believed that she was reincarnated but.... If she is why does she have the memories of her past life?

Not only she isn't the real daughter of the rich couple! She was swapped at the hospital and their real daughter god knows where!
She is also to be the Bride of the Gu family eldest grandson who is 2 years older than her!