You better watch some maps.
Been through this.
The Ghilzai call themselves what they are : Pashtuns
There is no difference between Ghilzais and Durranis at least not genetically and also culturally as both tribes practice the Pashtunwali. If the Ghilzai would be predominantly Turkic then they would also genetically cluster with Turkic peoples from CA or Afghanistan but they don't because they cluster the closest with Durrani Pashtuns in genetical tests. I know a Ghilzai Pashtun and he calls himself at first a Muslim and then Pashtun. He is not even aware of the partially Turkic origins of Ghilzais. If some Ghilzais want to see themselves as Turkic then they can do it. I don't have anything against it.
Yeah they call themselves Pakhtun but they recognize their Turkic roots although they no longer speak any dialect of Turkish.
No Durranis are considered to be descended from the Scythians and are related distantly to Rajputs of South Asia who some say have the same ancestral relation.
Sarbans - Wikipedia, the free encyclopedia
The Sarbans include many Pashtun tribes, among whom the most numerous are the
Durrani,
Shinwari,
Yusufzai,
Mohmand,
Kasi,
Khalil,
Tareen,
Miani and
Ormur tribes.
The name Saraban is evidently a corrupted, or perhaps a natural variant form of Suryabans the solar or royal race now represented in India by the Rajput. Similarly the names of the Saraban's sons Khrishyiin and Sharjyun, and of his grandson Sheorani, are clearly changed forms of the common Rajput and Brahman proper names Krishan, Surjan, and Shivaram or Sheoram
[6]
The name itself is similar (or identical) with the name of an historical tribe on
Caucasus that was also named
Sarbani (the Caucasian tribe was recorded under this name in the 10th century). According to some opinions, these Caucasian Sarbani are identified with
Serbs .
[7][8][9][10] Pashtuns are believed to be of
Scythian descent
[11] and their language is classified as East Scythian
[12] (Sarmatian language is also grouped within Scythian branch).
@
A Town you will find this interesting as well as it includes one rajput origin theory.
Although I think most genetics show most Afghans as Eastern Iranics except those who claim Turkic origin like the Ghilzais.