This two shows have a pretty cool similarity, that i'd recommend you to watch if you like one of them. Flying Witch and Mahoutsukai Precure!? both retain the slice of life element were they both have tried to keep their witch powers hidden from others. Both openings are lovable if you watch it long enough that is. Although Flying Witch does not have a evil encounter like Mahoutsukai Precure!? does they both are pretty enjoyable if your the type that watches animes with little to no romance and shounen action this is the show for you.
Basically, They Are Both Magical Girl Series, They Both Fight Monsters From Attacking There World, They Both Are 2016 Winter Anime's And They Both Have Cute And Sense Of Comedy, But The Plot Are Different, But Overall They Are Cute Series To Watch In Winter 2016.