They are both set in small towns in coastal areas and the synopsis of HC reminds me of WC which was a relaxing drama that I really enjoyed (but underrated.)

Both male lead have similar backgrounds.
They are both the sons of generals.
They both faced almost fatal life changing situations when they were younger which caused their martial arts to be completely destroyed and got severely poisoned.
They both can't fight at all but are extremely smart.
The difference would be NIF male lead lost his whole family because they were falsely accused of treason. He came back for revenge and to get justice and find out the truth for his family and everyone involved.
LIB male lead was abandoned by his own father to save the crown prince and his mother died saving him. He himself wanted to die but fml changed his mind when they were younger which made him kinda obsessed with her.
NIF is more about politics and scheming while romance is almost non-existent but LIB is more romance focused with some scheming and politics.

-Similar Feels
-Youth dramas with wuxia and politics
-Both are about a group of young talented people going on missions
-Both male leads are very intelligent
-Both female leads are great fighters and strong individuals
-Interesting side characters + their friendship + cute bromance/girlmance
-Great plot and very likable main characters
-Both totally recommended

Both are fantasy romance between an immortal who has been punished and a mortal human who can see ghosts. The main couples are quite similar. The girls has always been loners since they can see otherworldly beings. Both guys are totally in love with the main heroine. There are also evil spirits and ghosts that hero has to protect the heroine from. Overall feel of both dramas are similar. Great CG and awesome story with some comedy and tragedy. If you love Goblin, you will love A Korean Odyssey too.