They are both done by the same main director and if you look enough you can see where they are alike in his directing style. Both dramas deal with heavy elements of Xuanhuan and even have elements of friendship, an orphan ML with a hidden identity. Both shows also have those moment where you where wonder when did that happen and say what.
In both stories the protagonist trains to increase his spiritual power in order to take revenge on people who wrongeded him in the past. Having to hide their teal identity, they have to overcome many difficulties including some kind of sickness or curse in order to achive their goal. Supported by the female lead they make friends who will support them on their quest.
Protagonist trains to become stronger and take revenge on those who ronged him in the past. He is naturally gifted but still needs to increase his spiritual power. In both stories they save the girl who then supports them on their journey. Protagonist has to keep his real identity a secret. While training, he makes friends who support him on his quest. Also, same actor playing the protagonist.