Both FLs are spies/assassins
Both MLs have a mysterious birth background and people do not take them seriously.

These two dramas have a lot in common in terms of fights, suspense, and different sects. For AOS there is the mages who have different powers/ skills and for MJTY there is the Gong residence which has different families with different abilities. there is also some light humor in both dramas that eases the tension.