Somalis are actually very diverse on a phenotype basis, but overall we are still the same genetically. The reason why Somalis look diverse is because we have both North African & SSA ancestors, therefore some Somalis will look fully Afro-Asiatic and some will look "mixed-race" or more Sub-Saharan.
Before, I used to believe all pure Somalis looked like me(Caucasoid Skull with Straight hair) and that those who looked more sub-saharan were mixed with bantus, but it turned out I was was wrong when i argued with
@Apollo in a previous thread not too long ago. Somalis that look more Sub-Saharan simply inherited some sub-Saharan features from our ancient Sub-Saharan ancestors.
Somalis like me & my family look Afro-Asiatic and have a full Caucasoid skull & features like these people for example:
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Whereas some Somalis look more Sub-Sahara African: