The first difference is role setting!
Although Fei Xian is partly adapted from A Fairy Couple, only the characters have the same name. Later, when it was released, because the protagonist's name was Yong Dong, Flying Fairy was changed to Tong Yuan. Let the role settings be different again.
In the role setting of Fei Xian, not only the protagonist Tong Yuan is related to fairies. Even the supporting actor Old Master Q has something to do with fairies. And this is not in the "fairy couple".
In The Fairy Couple, the whole story is about Dong Yonghe's seven fairies, and by the way, there is a Qiaozui Zhang. But "Flying Fairy" is not set in this way, and it is different from "Fairy Match" in both plot and other role settings!
So, this is the first place where the plot is different. The role setting is different!
The second difference is the ending!
Many fairy tales are eventually torn to pieces or reduced to mortals. However, the ending of Flying Fairy is different. In Flying Fairy, the protagonist Tong Yuan marries seven fairies, and even the Queen Mother comes to the wedding. Although there is a time limit for them to be together, the ending is not the same as the ending of "A Fairy Match".
Moreover, the protagonist and the seven fairies in Fei Xian also gave birth to a son. Finally, Tong Yuan and the seven fairies met again after thousands of years! This ending is completely different from "The Match of Angels"!
Even the ending is different, how can the plot be the same?
So this is the second aspect of the difference between "flying fairy" and "fairy match"! What do you think of this, my old friend?