Actually USMA plays at its Bologhine for money purposes. Its very expensive to play at 5 Juillet because they have to train on it many times (renting costs). So, whenever given the opportunity they play in their local field (Stade Omar Hamadi AKA Bologhine). Its not about being 'chicken' or anything. USMA could actually do better in a stadium like 5 Juillet because its easier to control the ball compared to playing on turf. Also, they would have the crowd advantage, 80,000 compared to 10,000-15,000 max.
As for the 2 teams, USMA has been very strong these past 5 years and have done extremely well in the CL these last 2 years. This year's team is different with the departure of striker Mamadou Diallo to FC Nantes and the benching of the other 2 strikers Rabie Benchergui and Issad Bourahli for disciplinary reasons. However, we have some strong African players up front namely Mintou Doucoure from Mali and Michael Eneramo from Nigeria. The midfield is as strong as ever with Karim Ghazi coming back from Esperence "Taraji" of Tunis and with Hocine Achiou (goal-scorer against Egypt), Bilel Dziri (played in France, and used to play with Nejm Sahely "Etoile Du Sahel" of Tunisia) and Ammar Ammour (who was linked with a move to Al Ahly in the summer). I think it will be a good game. However, im in dissappointed that it wont be played in a world-class stadium because it really deserves to be.