Al-Sadd's fastest route is a pass from Camara into Afif after winning the ball. Al Ahli can move Al-Sadd's back line with midfield passes and wide receivers. The contest turns on who creates another useful box contact after the first breakthrough.
Afif scored from Camara's supply against Qadsiah, but Al-Sadd managed only two shots on target there and against Al Hilal. Al Ahli's Atangana and Aljohani can feed Trincao and Goncalves, with Al-Buraikan available as a central receiver after scoring in the latest league match. Toney travelled with the squad after missing that match, while Mendy's return has been reported; neither is needed as a confirmed starter for this picture.
Al Ahli should be able to keep delivering after Al-Sadd's first clearance. Their recent heavy league defeat came after an early goalkeeper dismissal and does not describe the current opening shape. That's why I'm siding with Al Ahli to win: their wide supply and second contact offer the stronger route to the decisive goal.