How does the Yellow Belly underside differ from wild-type?

Much cleaner, brighter white or pale yellow

In addition to the dramatic changes seen on the flanks, the belly coloration of the Yellow Belly morph also undergoes a notable transformation compared to its wild-type counterpart. A normal, wild-type Ball Python typically displays an underside that is often described as dirty white or possessing a grayish-white hue. In direct contrast, the Yellow Belly morph usually features a much cleaner, brighter underside, often appearing white or displaying a pale yellow coloration across the bottom surface of the snake.