Two Sedans with more similarities, such as the body structure, powertrain, market segment, height, and maximum occupancy, than differences, like the starting price, horsepower, fuel economy, and ground shadow size. First of all, there is a $36,650 difference in the base MSRP. The 2017 Mercedes-Benz S-Class Sedan Hybrid has a higher starting price than the 2017 Acura RLX Hybrid. Also, the 2017 S-Class Sedan Hybrid has a more powerful engine and gets 3 mpg less than the 2017 RLX Hybrid. And finally, the RLX Hybrid has a slightly smaller body than the S-Class Sedan Hybrid. Among similarities are the body structure, powertrain, market segment, height, and maximum occupancy.