The horsepower is a something that majority of car fans pay the biggest attention to. In this comparison, it is the Hummer that has by 53 horsepower more in comparison to the Mazda CX-9, which makes this car slightly quicker. Because of more horsepower the Hummer should as well give somewhat better flexiblility in specific speeds.
The width of the car influences on passanger's inner room and stability of driving. The Hummer H2 Standard is 127 millimeters wider in relation to the Mazda CX-9 3.5 263HP. It is clearly perceptible by driver and passenger in front, who have more space for their elbows.
The Hummer H2 Standard 6.0 V8 316HP has 8 % longer wheelbase than Mazda CX-9. Thanks to this the Hummer H2 Standard is safer and has a better stability. Moreover, longer wheelbase influences on convenient and more comfortable riding.
If you are a tall man or you happen to carry in the trunk thinks of big dimensions, the Hummer H2 Standard, which is by 249 mm higher than the Mazda CX-9, is better option for you. However, presented vehicles do not vary much it the aspect of its height and it should not be much perceptible.