Mnogi analitičari smatraju Južni tok za rivala projektu Nabucco, ali prema riječima Okumusa, pravi konkurent tog projekta je upravo Transanadolski gasovod.
Many analysts have seen South Stream as a rival to Nabucco, but according to Okumus, it's the Trans-Anatolian pipeline that is Nabucco's real competitor.