sure
i will try to put at least 20
reason 1 both are cartoons
reason 2 both are musicals
reason 3 both of the main characters are kids
reason 4 both main characters are 12
reason 5 both of the main characters grandmothers hate music and think its evil because of a tragic past in the anime mitsukis grandmothers fiance chose music over her same with the main character in cocos grandmother her husband chose music over her
reason 6 both main characters names start with m
reason 7 both main characters have musicians in the family and well known ones
reason 8 both are about undead things and the main characters are the only ones who can see them
reason 9 both main characters run away
reason 10 both grandmothers used to like music and do at the end
reason 11 both are deep
reason 12 both are sad
reason 13 both are sad deep dark and mature for there kind of cartoons
reason 14 both main characters hide there music life
reason 15 both are about death
reason 16 both main characters come back home