Both are school related (Baldi's Basics taking place in a school and I.M. Meen's source material being a educational game) deranged psychopaths with a hatred of notable things (Baldi hating when you get a problem wrong and Meen hating smart children), They are also related to books (Baldi having 7 notebooks and Meen having a magic book with literal buildings inside) They are also defeated if you escape their buildings (The school and Meen's labyrinth) with two goals (Getting all 7 notebooks and defeating Meen) funnily enough, Meen's game is a inspiration to Baldi's Basics