Ford has 56 mm longer wheelbase in relation to the Hummer. A longer wheelbase provides more stable and comfortable ride, especially at higher speeds. It also gives more storage space. But, cars having a longer wheelbase are not as maneuverable as those with a shorter length between its axles.
The Ford Explorer IV is 178 millimeters longer when compared to the Hummer H3. The length of the car plays a role when it comes to travelling comfort and room in the boot. The Ford Explorer IV Sport probably will be offering to it's users more room for legs. At the same time the Ford Explorer IV will be better driven ,however, the Hummer H3 5.3 300HP will be a slightly easier to park because of shorter length .
Model release date
Given that the Hummer H3 debuted only 1 year earlier than the Ford, the distance in technology applied in both cars is not really big, however, the Ford Explorer IV may feature a bit more advanced solutions applied in it.