Yaoi shota action is something you don't come across often in the world of anime. Both anime even feature the same character designer, scriptwriter and director. But really, young boys in drag getting their little bungholes penetrated is enough to draw the similarities, if you're into that kind of stuff. YOOOOOOOOOOOOO!
While Shounen Maid is not the masterpiece that Shounen Maid Kuuro-kun is, both have very similar qualities. For example, both have MC's who are trap characters that work as a boy maid. Furthermore both have a guy takes the MC to his home to work for various plot reasons.