Performance
As far as horsepower, the Mazda MAZDASPEED MAZDA3 packs quite a punch and will knock the Subaru Forester down a few rungs. On the flip side, keep in mind that high horsepower engines often command higher insurance premiums.
Handling
With their similar turning circles, the Subaru Forester and the Mazda MAZDASPEED MAZDA3 doubtless handle approximately the same into and out of tight spots.
Drivetrain
The Mazda MAZDASPEED MAZDA3's engine is slightly smaller than the Subaru Forester's, but not terribly so.
Torque is the force that lets you accelerate quickly, and in this respect, the Mazda is tremendously more powerful than the Subaru Forester.
The Mazda MAZDASPEED MAZDA3 packs quite a punch compared to the Subaru Forester in terms of torque, which is roughly equivalent to acceleration.
Utility
Neither the Mazda nor the Subaru Forester has a marked advantage when it comes to seating capacity.
Comfort
While the front cabin in the Mazda MAZDASPEED MAZDA3 offers a bit more head room than the Subaru Forester, there really isn't much of a difference.
The Mazda MAZDASPEED MAZDA3 offers more head- and leg-room to your passengers than the Subaru Forester does.
Dimensions
The Mazda MAZDASPEED MAZDA3's tank is about the same size as the Subaru Forester's, though the Subaru Forester's is slightly more capacious.
The Forester rides lower than the Mazda MAZDASPEED MAZDA3, which is a good thing for its center of gravity and ease of access.
The Subaru and the Mazda MAZDASPEED 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 roughly the same to get the Mazda to the dealership as the Subaru.
The Subaru Forester isn't much costlier than the Mazda MAZDASPEED MAZDA3 when it comes to MSRP.
Overview
The Subaru Forester and the MAZDASPEED MAZDA3 have the same basic warranty.