If you liked one,you will like the other.Both are very heartwearming with a heartwarming and happy ending song.Both have a very likable
only girls cast, honestly I can't find a character from both shows that I didn't like. Both have lots of friendship elements,bonding,
nakama,that you can't defeat an enemy alone.
Brave witches happens after the events of Strike witches, but it's not necessary to watch one to understand the other.Both about a world war 2 period,but against a humanity enemy Neuroi,in Brave Witches it seems stronger.
Both have lots of cultural things,since characters in both series are from different parts of the world.Setting doesnt take in Japan, which
is unusual and admirable, in Strike Witches it's Brittania while Brave witches takes place in Orussia.
Both have drama.
Brave Witches has very little fanservice, so if you didn't like it in Strike witches, but liked everything else, you will LOVE Brave Witches.
Strike Witches characters make a cameo in Brave Witches. (Sanya,Eila and Yoshiko)