We've eaten at both.
Morrocan food has sweeter overtones, but I prefer entrees to be more savoury. However, the atmosphere, decor and entertainment were very good. If you like or want to try Middle Eastern food, this would be a good choice or you could go to the Tangierine Cafe for a lighter meal.
Via Napoli has excellent thin crust Neapolitan style pizza baked in wood fired ovens that you can see from many of the tables. It also has very good appetizers and one of my favorite DW desserts - the Coppa di Brutti ma Buoni (Ugly, but Good Sundae). The decor is light, bright and airy, but it can get very noisy.