Why was the horse favourable to Mourad and not Aram?
Mourad had a way with the horse which means he had a special innate knack that helped deal with the animal. He could keep it calm so that it performed according to his wishes. The horse itself allowed Mourad to ride it, he would kick his heels into the horse and shout for the horse to run and the horse would burst into a fury of speed which was a sight to behold. He raced the horse across a field of dry grass into an irrigation ditch, crossed the ditch on the horse and returned dripping wet after five minutes without the hint of trouble. The horse instinctively figure out that Aram was not used to riding a horse.