Utility
The Mazda MAZDA6 and the Saturn Aura can accommodate the same number of passengers.
Dimensions
Your wallet will hurt more every time you fill up the MAZDA6 than the Saturn Aura because of its larger tank.
The Saturn Aura and the Mazda MAZDA6 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 about the same to get the Saturn Aura to the dealership as the Mazda MAZDA6.
The Saturn isn't much pricier than the Mazda MAZDA6 when it comes to MSRP.
Handling
With its tighter turning circle, the MAZDA6 is definitely nimbler than the Saturn Aura, something to consider if you do a lot of city driving; however, remember that a vehicle with a tight turning circle may feel a bit twitchy on the highway.
Drivetrain
The Saturn Aura's engine is somewhat smaller than the Mazda MAZDA6's, but not terribly so.
Torque is the force that lets you accelerate quickly, and in this respect, the Mazda MAZDA6 isn't much more powerful than the Saturn Aura.
Comfort
While the rear of the Mazda offers a bit more head- and leg-room than the Saturn Aura, there frankly isn't much of a difference.
Warranty
The Saturn Aura and the Mazda have the same basic warranty.