no no no. A ringer dont have as much white on as a pied. ringers are also called pied spots they are identified by a low white marking usually found starting at the vent of the snake that then creeps up around the side. how the white mark first occured is still a mystery as the markings of a ringer have not yet been proven to be an inheritable marker.
it has been knowen for ringers to hatch out of a batch of eggs produced by two normals and visa versa people have tried breeding two ringers but have only hatched normals. i would not say they are one off snakes because they are widely available.