Both of these dramas strongly utilize an off-beat, random style of comedy strongly driven by eccentric characters.
Slapstick humour, silly, parody, breaking fourth wall. Both are famous epic comedy parody........................
One is a mashup of classic Japan/epic samurai stories and sci-fi, the other a real life version of old school rpg games, and they share the same brand of silly fourth-wall-breaking humor, the same way of making fun (in an affectionate way) of beloved classics and the same way of mixing up ancient and modern. They're different stories but have a very similar vibe!
Both are directed by Fukuda Yuichi. Slapstick humour, silly, parody, breaking fourth wall &.......... Swordplay!!................................. Both are very similar.