Two Vans with more similarities, such as the body structure, starting price, and ground shadow size, than differences, like the height, maximum occupancy, and horsepower. First of all, the 2015 Nissan NV Passenger has a more powerful engine than the 2016 Ram Promaster Window Van. Also, the 2015 NV Passenger has a significantly taller body than the 2016 Promaster Window Van. And finally, there is a difference in the number of passengers; the NV Passenger seats six more the Promaster Window Van. Among similarities are the body structure, starting price, and ground shadow size.