Utility
The Mercury Mariner Hybrid is a better choice than the HUMMER H3 with respect to transporting cargo, especially if you often need to carry a lot of luggage or sizeable beasts.
Neither the HUMMER H3 nor the Mercury Mariner Hybrid has a marked advantage regarding seating capacity.
Towing is significantly more the HUMMER H3's forte than it is the Mercury Mariner Hybrid's.
Performance
In terms of horsepower, the HUMMER packs quite a punch and will knock the Mercury down a few rungs. However, remember that high horsepower engines often command higher insurance premiums.
Dimensions
The HUMMER H3 is significantly more ponderous than the Mercury Mariner Hybrid.
Your wallet will hurt more every time you fill up the HUMMER H3 than the Mercury Mariner Hybrid because of its bigger tank.
The Mercury Mariner Hybrid and the HUMMER H3 compete for the same parking spaces.
The Mercury Mariner Hybrid's shorter wheelbase will likely give a nimbler feel in daily traffic. On the flip side, the HUMMER H3 is likely to have a smoother, more stable ride.
Convenience
You will quite certainly have to visit your friendly gas station more often with the H3 than with the Mercury Mariner Hybrid.
Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. It costs about the same to get the HUMMER H3 to the dealership as the Mercury.
The Mercury will save you money at the pump compared to the HUMMER.
The Mercury Mariner Hybrid isn't much less costly than the HUMMER as far as MSRP.
The Mercury Mariner Hybrid will save you a bundle at the pump every year compared to the HUMMER H3.
The HUMMER will cost you a bunch of money in gas every year compared to the Mercury.
Handling
The HUMMER H3 has markedly bigger tires than the Mariner Hybrid. Remember that bigger tires could look and feel better, while narrower tires could improve gas mileage.
With their comparable turning radii, the H3 and the Mercury Mariner Hybrid quite certainly handle approximately the same into and out of tight spots.
Drivetrain
The Mercury's engine is tremendously smaller than the HUMMER's. Remember that smaller engines can be stressed more; on the flip side, smaller engines are often cheaper to fix.
Torque is the force that lets you accelerate quickly, and in this respect, the HUMMER H3 is tremendously more powerful than the Mercury Mariner Hybrid.
Torque equals pickup, and the HUMMER H3 will have picked up and gone by the time the Mariner Hybrid finally gets moving.
Comfort
While the front cabin in the HUMMER H3 offers a bit more head room than the Mercury Mariner Hybrid, there really isn't much of a difference.
While the rear of the HUMMER H3 offers a bit more head- and leg-room than the Mercury Mariner Hybrid, there honestly isn't much of a difference.
Overview
The basic warranty that comes with the Mercury Mariner Hybrid isn't quite as generous as the H3's.