Recently, a Live Science article took up the differences between bisons and buffaloes. These animals do look a bit alike, but there are some major differences. American bison are shaggy and have a shoulder hump, but the buffaloes of Asia and Africa don’t. They are more adapted to a warmer climate.
However, the differences do not nullify the obvious, i.e., they belong to the same Genesis kind. This phenomenon can also be seen in many other animals.