  The Variant-rule derives from the Precursor-rule by interchanging two classes
of its 28 isotropic mappings. Although this small mutation conserves most
glider types and stable blocks, glider-gun engines are changed, as are most
large scale pattern behaviors, illustrating both the robustness and fragility
of evolution. We demonstrate these newly discovered structures and dynamics,
and utilising two different glider types, build the logical gates required for
universality in the logical sence.
