The cultural/linguistic difference between Somalis, is that the further North you go, the more direct people are. In the South, people will smile in your face and stab you when you least expect it. That's the main difference. Not more or less qabiilist, just more or less direct with it.
That's why on this forum, you'll notice that some people speak in tongues, riddles and so forth, whereas other people are more direct.
Yeah, whether Isaaq, Dir or Darood, people in the North have this no nonsense approach to things, as in 'stop wasting our time' and get to it.
I wonder why the South developed that way? Cause I know the Amhara think like that too, in fact it's something claim proud of, an interesting question to ponder.