Nekomimi and Inumimi are some more accurate designation for such designed characters. But there is one essential difference. The word Nekomimi (猫耳) means  cat-ears  in english. On the other hand you have the word Inumimi (犬耳) what means  dog-ears .And this is pretty much the difference... Nekomimi are styled like cats and Inumimi are styled like dogs.ekomimi and Inumimi are some more accurate designation for such designed characters. But there is one essential difference. The word Nekomimi (猫耳) means  cat-ears  in english. On the other hand you have the word Inumimi (犬耳) what means  dog-ears .