What is the Difference between Mutant and Inhuman ?

What is the Difference Between Mutant and Inhuman ?
In Marvel comics we have several races that differ from the common human. With this, people emerge with a series of special abilities, capable of doing great wonders in the stories of this universe. In the midst of all this we have two species that are quite similar: mutants and inhumans. But, after all, what is the difference between the two?
Basically, the main differences between mutants and inhumans are in their DNA, the way their powers manifest themselves and the way each species organizes itself. Let's talk about each of these cases!

A different DNA
Mutants are from the superior Homo sapiens race, people who were born with the X Gene, who were created through genetic enhancement caused by the Celestials in primitive humans, something that is usually just called natural selection.
They are, therefore, different from Homo sapiens, ordinary humans — even those endowed with powers, such as Doctor Strange and Spider-Man — since from birth they already have a characteristic in their DNA that differentiates them.
As we saw in the X-Men comics, not everyone who possesses the X Gene is gifted with incredible super powers. In fact, this is proportionally unusual. Most Superior Homo Sapiens may only have some physical change or deformity.
The Inhumans are of the Inhomo Supremis or Homo sapiens inhumanus race, they were created through Kree experimentation that sought to evolve Earth's primitive humans so that they could be used as super soldiers in the war against the Skrulls.
In other words, they have always been genetically programmed to be powerful and lethal. Therefore, even without going through Terrigenesis and gaining their special abilities, inhumans already have a set of superhuman characteristics — such as superhuman strength, resistance, stamina and agility. Because of this, we basically don't have inhumans who are just bizarre or have some negative physical alteration.

The development of your powers
Even though some mutants are already different from birth — which usually results in the abandonment of children or persecution by extremist groups at an early age — most mutants only develop their powers (and activate the X Gene) after a traumatic situation or during puberty.
Jean Grey, for example, was already a superior Homo sapiens from birth. However, her mutant gifts were only activated after witnessing her best friend being run over and killed. Kitty Pryde, on the other hand, developed her mutant powers during puberty. Meanwhile, Noturno already had his physical changes — three fingers on each hand, tail and bluish fur — since birth, which led to him being abandoned.

Extremely different societies
Inhuman society is extremely different from human (and mutant) society. Focused on well-defined laws and committed to the mission of genetic improvement, all aspects of society are well controlled and organized.