These two Mercedes-Benz CLA-Class models are two types of the same model with one major difference, the modifications. First of all, the 2016 Mercedes-Benz CLA-Class AMG CLA 45 pulls more horsepower than the 2015 Mercedes-Benz CLA-Class CLA 45 AMG. Among similarities are the body structure, market segment, starting price, fuel economy, ground shadow size, height, and maximum occupancy.