Utility
Neither the Mazda MAZDA6 nor the Honda Accord has a marked advantage as far as seating capacity.
Performance
As far as horsepower, the Mazda MAZDA6 packs quite a punch and will knock the Honda Accord down a few rungs. However, remember that high horsepower engines often command higher insurance premiums.
Dimensions
The Mazda MAZDA6 and the Honda Accord compete for the same parking spaces.
Convenience
The MAZDA6's fuel tank will need to be replenished more often than the unit in the Honda.
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 Accord to the dealership as the MAZDA6.
The Mazda MAZDA6 requires a lot of gasoline compared to the Honda Accord.
The Mazda MAZDA6 pales in comparison to the Honda Accord regarding gas mileage.
With respect to MSRP, the Honda Accord costs almost as much as the Mazda (though the Mazda is a bit cheaper).
The MAZDA6 will cost you a bundle in gasoline every year compared to the Honda Accord.
The Honda Accord will save you a lots_of_money at the pump every year compared to the MAZDA6.
Handling
With their similar turning circles, the Mazda MAZDA6 and the Honda Accord most certainly handle about the same into and out of tight spots.
Drivetrain
The Mazda MAZDA6's engine isn't much more massive than the Honda's.
Torque is roughly equivalent to acceleration, and in this respect, the Mazda isn't much more powerful than the Honda Accord.
Comfort
Taller drivers will significantly enjoy the extra head room in the Accord's front cabin compared to the Mazda MAZDA6.
While the rear of the Accord provides a bit more head- and leg-room than the Mazda MAZDA6, there honestly isn't much of a difference.
Overview
The Honda Accord and the MAZDA6 have the same basic warranty.