It’s made by the same writer/director and the plots are really similar, young naive happy guy, faces evilness of the world, fights against injustice and has bromance

uncle samsik is like a continuation of mr sunshine, one set in 1900-20s while the other is around 1940-60s
uncle samsik isn't as "romanticized", and more political scheming, but the addition of byun yohan really makes it feel like a sequal

both stories are female centrist and revolves around dance, and I'd assume friendship, maybe even underdog type of plotline

Both are about a “househusband” with a secret past hidden from his family so they think he’s a loser but he’s a great secret agent

Both dramas are similar in the way they revolve around peculiar death styles and murderous schemes and both are a it episodic

will you kill a murderer? for justice, power, money, does it justify another murder

that's basically the main plotline in both stories, do criminals deserve protection

Both dramas are about a society that’ll do anything for money, murder, nitty gritty crimes while there’s a mastermind enjoying the mess

both Friendly Rivalry and Pyramid Game are a high school focused female centered plot, that revolves around friendship and obsession

Falsely accused, hidden long term murder mystery, ml trying to find the truth, police brutality, unlikely paring bonding together to find the truth
And maybe more

Both dramas are similar in the “falsely accused”, that needs to prove their innocence when no one else believes in them

both dramas talk about bullying in high school, an app to bring people down, and they share an actress

both are suspenseful stories that are reveal in small doses with great acting and thrilling elements