I'd like to point out that if one person's IQ score is higher than another person's IQ score, that doesn't make the higher IQ person a "superior" human. It does mean that they have a superior (higher in rank) IQ score. But no single trait superiority makes a superior human.
Normally we would say that it's subjective, but for some reason it's not enough that IQ be a possible valid basis for preferring some people to others is it? It has to be explicitly invalid, in contrast to any other potential trait. Source: these responses.