Both are detective dramas
both have older younger friendship at odds between the leads
both have bromance

Both are detective dramas
both have bromance between two leads
both have psychological aspect in solving cases

Both are detective dramas
both have psychological aspect in solving cases
both have bromance between male leads

Both detective dramas
both have partnership between a detective and suspicious partner
both have male friendship

Both are detective dramas
both have male lead detective and kind of suspicious partner helping him solving cases
both have bromance

Both based on actual history
both have same historical era and same historical characters but different production and actors

Both are republican era dramas
Both dramas have romantic relationships and Slight Bromance
both deal with war an fighting the enemies

Both republican era drama
both have Bromance and also romantic relationship
both deals with War

Similar vibes ,, Investigative work
genius young detective
both drama are thrilling dramas very interesting

Both dramas about detectives in historical times
both dramas have good friendship between male leads

Both dramas about the royal court affairs
and detective investigations
Both have Bromance between male leads I think

Both dramas are about investigations in historical times \

both drama has good friendship between male leads