The stories have completely different plots. But they have intricate plots within plot with depths of each character and explains each personality.
The vibes are similar especially the CGI and scenery. Both xianxia dramas with romance being the main theme.

Both have same ML, who acts with the same humour, wittiness, cleverness of schemes and learns martial arts and scheming through experience and guidance by their respective fathers.
The whole drama has the same vibes throughout and reminds me of each with the schemes and fighting style (wuxia).

Same historical figures although told in a similar story but characters are different.
Same history. Same or similar names. Story told in another light

Both have empowering FL.
Both have the idea of balancing the court with adopting talents system instead of abolishing protecting noble families inheriting titles system. If they only offer positions to noble families and following generations, then they miss opportunity for real talents from all backgrounds. But they cannot upset noble families so they adopt talents recruiting system so all that have talents can partake imperial exams