Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. It costs almost the same to get the Mercury Mariner to the dealership as the Toyota RAV4.
There really isn't much of a difference in gas mileage here, but if you must know, the Mercury Mariner is somewhat more economical than the Toyota RAV4.
With respect to fuel economy, the Mercury Mariner is a tad better than the Toyota RAV4, but not by much.
The Mercury Mariner isn't much costlier than the Toyota in terms of MSRP.
Utility
Drivers with frequent child-duty might favor the RAV4 over the Mercury Mariner.
Convenience
You most certainly won't have to visit your friendly gas station more often with the Toyota RAV4 than with the Mercury Mariner, as both offer similar ranges.
Comfort
While the front cabin in the Toyota RAV4 offers a bit more head room than the Mercury, there frankly isn't much of a difference.
The ampler interior dimensions of the Toyota RAV4 make it substantially roomier for your passengers than the Mariner.
Dimensions
The RAV4's tank is almost the same size as the Mercury Mariner's, though the Mariner's is somewhat bigger.
The Mercury Mariner and the Toyota RAV4 compete for the same parking spaces.
Handling
With their similar turning radii, the Toyota RAV4 and the Mercury Mariner most certainly handle about the same into and out of tight spots.
Drivetrain
Torque is roughly equivalent to acceleration, and in this respect, the RAV4 isn't much more powerful than the Mercury.
Warranty
The Mercury Mariner and the Toyota RAV4 have the same basic warranty.