Handling
With their similar turning radii, the Chevrolet Cobalt and the Mazda most definitely handle almost the same into and out of tight spots.
Drivetrain
The MAZDA3's engine is somewhat smaller than the Chevrolet's, but not terribly so.
The MAZDA3 has no lessons to learn as far as pickup from the Chevrolet Cobalt.
Utility
The Mazda MAZDA3 and the Chevrolet Cobalt can accommodate the same number of passengers.
Convenience
You'll most definitely take the Mazda MAZDA3 for a fill-up roughly as often as the Chevrolet Cobalt.
Comfort
While the front cabin in the Mazda offers a bit more head room than the Chevrolet Cobalt, there honestly isn't much of a difference.
The Mazda MAZDA3 provides more head- and leg-room to your passengers than the Chevrolet Cobalt does.
Dimensions
Your wallet will hurt more every time you fill up the Mazda MAZDA3 than the Chevrolet Cobalt because of its bigger tank.
The Chevrolet Cobalt and the Mazda MAZDA3 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 approximately the same to get the Chevrolet Cobalt to the dealership as the Mazda MAZDA3.
Regarding fuel economy, the Cobalt bests the MAZDA3.
The Mazda MAZDA3 uses a lot of gas compared to the Chevrolet Cobalt.
The Chevrolet Cobalt is significantly less expensive than the Mazda MAZDA3 regarding MSRP.
Warranty
The Chevrolet and the MAZDA3 have the same basic warranty.