2016 Hyundai Sonata Hybrid is the newer version with some differences, such as the model year, horsepower, and fuel economy.. First of all, there is a difference in model years. The is 2 years newer. And finally, the 2014 Sonata Hybrid has a more powerful engine than the 2016 Sonata Hybrid, and it gets 3 fewer miles on a gallon of fuel. Among similarities are the body structure, market segment, starting price, ground shadow size, height, and maximum occupancy.