Handling
With their similar turning radii, the Infiniti QX56 and the H2 SUT most certainly handle almost the same into and out of tight spots.
Drivetrain
The Infiniti QX56 and the HUMMER H2 SUT have similar-sized engines, with a slight advantage to the HUMMER H2 SUT.
The Infiniti QX56 has no lessons to learn regarding torque from the HUMMER.
Utility
Drivers with frequent child-duty might favor the Infiniti QX56 over the HUMMER H2 SUT.
The HUMMER H2 SUT is likely a better choice than the Infiniti QX56 as far as hauling capacity, especially if you frequently need to carry a lot of suitcases or massive dogs.
Comfort
While the front cabin in the H2 SUT offers a bit more head room than the Infiniti QX56, there honestly isn't much of a difference.
The Infiniti QX56 provides more head- and leg-room to your passengers than the HUMMER does.
Dimensions
The HUMMER H2 SUT is significantly heavier than the QX56.
Your wallet will hurt more every time you fill up the HUMMER H2 SUT than the Infiniti because of its bigger tank.
The HUMMER H2 SUT and the Infiniti QX56 compete for the same parking spaces.
Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. It costs roughly the same to get the Infiniti QX56 to the dealership as the HUMMER H2 SUT.
The HUMMER H2 SUT isn't much pricier than the QX56 as far as MSRP.
Warranty
The basic warranty that comes with the H2 SUT isn't quite as generous as the Infiniti QX56's.