Two Sedans with some similarities, but otherwise different in most aspects such as the powertrain, horsepower, fuel economy, market segment, and starting price. First of all, the 2015 Audi RS 7 has bigger and thirstier engine; the 2016 Porsche Panamera Hybrid gets 6 more mpg. Also, the 2016 Panamera Hybrid is priced $10,400 lower compared to the base MSRP of the 2015 RS 7. Among similarities are the body structure, market segment, height, and maximum occupancy.