At Group's headquarters in Oman, all the matches of Group A are held and this may balance any "superiority" of Kuwait that the book invokes to give the home team an underdog. They both won the championship relatively easily in their countries and the only "advantage" I see in the Kuwaitis is the presence of Diemersi M'Bocani, something of course which did not help in the premiere as it failed to beat Ansar (1-1)
I estimate that Sim at least will not lose.