Al Ahli versus Al Nassr? I would put my money into Al Nassr. If it was Ittihad then I understand, but Nassr managed to beat them too, or if it was Hilal then I would understand that too, but with Ahli? I am sure that Nasr will end up winning without much trouble.
The only downside that we are seeing right now is Ronaldo getting used to new teammates all the time, he has been there for 2.5 years, and now this is his third full season, and in almost all of them, he played with different players. The one person they hold is Ronaldo ,rest are changing mostly. Some are still the same, like Mane for example, but not all the team , so there is nothing that screams chemistry for me, if they have any trouble, it would be because of that.