Utility
The HUMMER H2 SUT will quite certainly prove handier than the BMW X6 for those of you with frequent child-cargo.
The HUMMER H2 SUT is likely a better choice than the X6 in terms of transporting cargo, especially if you frequently need to carry a lot of cargo or large animals.
The HUMMER outpulls the BMW by a big margin.
Performance
With that kind of horsepower, both the HUMMER H2 SUT and the BMW X6 are true speedsters.
Dimensions
The HUMMER H2 SUT is tremendously heavier than the X6.
Your wallet will hurt more every time you fill up the HUMMER H2 SUT than the BMW X6 because of its larger tank.
The HUMMER H2 SUT and the X6 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. The X6 is considerably cheaper to get to the dealership than the HUMMER H2 SUT.
Regarding MSRP, the BMW X6 costs approximately as much as the HUMMER H2 SUT (though the HUMMER H2 SUT is a tad cheaper).
Handling
With their similar turning radii, the X6 and the HUMMER H2 SUT quite certainly handle about the same into and out of tight spots.
Drivetrain
The HUMMER H2 SUT has a more massive engine than the X6. Remember that smaller engines typically get better gas mileage, but a smaller engine usually has to work a little harder.
Torque equals pickup, and the HUMMER H2 SUT will have picked up and gone by the time the BMW X6 finally gets moving.
Comfort
Taller drivers will significantly enjoy the extra head room in the HUMMER H2 SUT's front cabin compared to the BMW X6.
The HUMMER H2 SUT provides more head- and leg-room to your passengers than the BMW X6 does.
Warranty
The BMW X6 and the HUMMER H2 SUT have the same basic warranty.