Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. It costs roughly the same to get the Mazda MAZDA3 to the dealership as the Subaru.
Regarding MSRP, the Subaru Outback costs tremendously more than the MAZDA3.
Utility
The Mazda MAZDA3 and the Outback can accommodate the same number of passengers.
Comfort
While the front cabin in the MAZDA3 offers a bit more head room than the Subaru Outback, there really isn't much of a difference.
The Mazda MAZDA3 offers more head- and leg-room to your passengers than the Subaru Outback does.
Dimensions
The Subaru Outback is considerably more ponderous than the Mazda MAZDA3.
The Mazda MAZDA3's tank is approximately the same size as the Subaru Outback's, though the Subaru Outback's is somewhat bigger.
The Subaru Outback rides lower than the Mazda MAZDA3, which is a good thing for its center of gravity and ease of access.
The MAZDA3 and the Subaru Outback compete for the same parking spaces.
Handling
The Subaru Outback and the Mazda have about comparable tires.
With their similar turning radiuses, the Mazda MAZDA3 and the Subaru Outback definitely handle about the same into and out of tight spots.
Drivetrain
The Subaru Outback's engine isn't much larger than the Mazda MAZDA3's.
The Mazda MAZDA3 could learn a lesson or two from the Outback with respect to torque.
Overview
The Subaru Outback and the MAZDA3 have the same basic after-sale protection.