Two Coupes with some similarities, but otherwise different in most aspects such as the modifications, horsepower, fuel economy, starting price, ground shadow size, and maximum occupancy. First of all, the 2015 Honda Civic Coupe Si w/Summer Tires is priced $3,860 lower compared to the base MSRP of the 2016 Hyundai Genesis Coupe. Also, the 2016 Genesis Coupe has bigger and thirstier engine; the 2015 Civic Coupe Si w/Summer Tires gets 6 more mpg. In addition, the body structure of Civic Coupe Si w/Summer Tires is slightly smaller than that of the Genesis Coupe. And then, there is a difference in the number of passengers; the Honda Civic Coupe Si w/Summer Tires seats one more the Hyundai Genesis Coupe. Among similarities are the body structure, market segment, and height.