The main differences between the British Shorthair and the American Shorthair are different breeds, different body shapes, different coat colors, and different personalities. The British Shorthair is a British shorthair cat, and the American Shorthair is an American shorthair cat. The British Shorthair has a more rounded body shape and a more rounded coat color. Mainly blue, the character is quiet and aloof; the American shorthair is not as rounded as the British shorthair, the coat color is mainly tabby, the personality is gentler, and it is very smart.