2016 Volkswagen Beetle Convertible is the newer version with some differences, such as the model year, horsepower, and fuel economy.. First of all, the 2013 Beetle Convertible has a more powerful engine than the 2016 Beetle Convertible, and it gets 2.7 fewer miles on a gallon of fuel. Among similarities are the body structure, market segment, starting price, ground shadow size, height, and maximum occupancy.