Two Minivans with more similarities, such as the body structure, starting price, fuel economy, and height, than differences, like the horsepower, maximum occupancy, and ground shadow size. First of all, the 2015 Ram Promaster City has a more powerful engine than the 2016 Chevrolet City Express. Also, the 2016 City Express is slightly smaller than the 2015 Promaster City. And finally, there is a difference in the number of passengers; the Promaster City seats three more the City Express. Among similarities are the body structure, starting price, fuel economy, and height.