Jens Sannek again shared with me a photo of the stallion Haddad (Selim x Arezoo), an important sire in Iran, and the full brother of Khamseh that went to Europe. Haddad and Khamseh are of the Hamdani strain of the Sh. Hajat of the Al Katheer Bedouin tribe.
Built rather like a sighthound, with that longer loin and forward-set foreleg, though the scapula is much more oblique. The angle of the photo may contribute to the impression, though.