Cost
With respect to fuel economy, the MAZDA3 and the Toyota Camry don't differ much.
The Camry is significantly costlier than the MAZDA3 when it comes to MSRP.
Utility
The Toyota Camry and the Mazda can accommodate the same number of passengers.
Convenience
You'll definitely take the Mazda for a fill-up about as often as the Toyota Camry.
Comfort
The ampler interior dimensions of the Toyota Camry make it substantially roomier for your passengers than the Mazda MAZDA3.
Dimensions
The Toyota Camry is tremendously more bulky than the Mazda MAZDA3.
Your wallet will hurt more every time you fill up the Toyota Camry than the Mazda MAZDA3 because of its larger tank.
The MAZDA3 and the Toyota Camry compete for the same parking spaces.
Performance
When it comes to horsepower, the Toyota packs quite a punch and will knock the Mazda MAZDA3 down a few rungs. However, remember that high horsepower engines often command higher insurance premiums.
Handling
With their similar turning radii, the Mazda MAZDA3 and the Toyota most certainly handle almost the same into and out of tight spots.
Drivetrain
The Toyota's engine is considerably bigger than the MAZDA3's. Bear in mind that larger engines may use more gas than smaller ones.
The MAZDA3 could learn a lesson or two from the Toyota Camry with respect to torque.
Warranty
The Mazda MAZDA3 and the Toyota Camry have the same basic warranty.