Im sorry if i come off as aggressive or rude but please read the ability properly. The Superior Human page literally says:
Homo Superiors can also be divided into two categories:
Rational
Metahumans of this category gain their powers by an unusual evolutionary process by chance in each individual, unnatural birth causes, certain serums, genetic engineering, or exposure to radiation or biohazardous substances, like mutagens, or any other methods in relation to genetic experimentation in that regard.
In one way or another, certain superhumans that are of this classification might have minor physical changes without their humanity being fully or almost slipped away, like their irises changing to any color like a fiery shade of red, yellow, purple, etc, retractable claws or spikes, fangs or sharp teeth, the color of the skin being changed, among others. In fact, these kinds of superhumans will be able to possess powers without their physiology being altered and lose their humanity as a result.
Irrational
By this category, metahumans gain their powers by having their abilities bestowed upon them by supernatural beings, enchantment, training to self-bestow their powers like telekinesis for example, being blessed or granted wishes to obtain their powers, and among many other methods without any scientific modification. Most of these kinds of superhumans have the potential to become mystical class superhumans.
Unlike the rational-based types, this category of superhumans wouldn't have to be able to suffer mutations and instability of their deoxyribonucleic acid, which can be caused in certain ways. Unlike the rational based category, these kinds of superhumans are more likely to maintain their humanity because they don't share the same genetic unpredictably that rational-based superhumans are more likely to have.