Are to the sky kingdom Xuan Mo and Michelle Ye the same person?

No, they are twin brothers.

YeHua, like Mo Yuan, is the son of his father. At that time, the mother was pregnant with two children, one was her brother Mo Yuan and the other was her brother YeHua, but later she gave birth to Mo Yuan, and YeHua was stillborn. Father didn't have the heart to take out YeHua's Yuan God and raise him in his own Yuan God. He made a fairy body for YeHua with half of his cultivation, but she still didn't wake up after injecting Ye Hua's Yuan God into it, so she continued to raise him in the Yuan God. It was not until his father told Mo Yuan about it that it surfaced, and he gave Mo Yuan YeHua's Yuan God and immortality. Mo Yuan continued to keep YeHua's Yuan God in his own Yuan God until he sacrificed the Eastern Emperor Zhong with his own Yuan God. Bai Qian was heartbroken and kept calling Master Mo Yuan to wake up, but he woke up the Yuan God of YeHua. Later, the immortal body of the father's sculpture turned into an egg (in the play, it turned into a golden lotus). After waking up, he has been nourishing Mo Yuan's soul until 78000.