Utility
The SX4 and the Impreza Outback Sport can accommodate the same number of passengers.
Dimensions
The Subaru Impreza Outback Sport is tremendously more bulky than the Suzuki SX4.
Your wallet will hurt more every time you fill up the Subaru Impreza Outback Sport than the Suzuki SX4 because of its bigger tank.
The Suzuki SX4 and the Impreza Outback Sport compete for the same parking spaces.
Convenience
You'll quite certainly have to take the Suzuki SX4 for a fill-up more often than the Subaru Impreza Outback Sport because of its tank size and fuel economy.
Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. It costs almost the same to get the Subaru Impreza Outback Sport to the dealership as the SX4.
In terms of gas mileage, the Suzuki SX4 and the Subaru Impreza Outback Sport don't differ much.
The Suzuki SX4 won't save you much money at the pump compared to the Impreza Outback Sport.
As far as MSRP, the Subaru Impreza Outback Sport costs significantly more than the Suzuki SX4.
Handling
With their comparable turning radii, the Subaru Impreza Outback Sport and the Suzuki SX4 quite certainly handle almost the same into and out of tight spots.
Drivetrain
The Subaru Impreza Outback Sport's engine is considerably more sizeable than the Suzuki SX4's. Note that more sizeable engines may use more gas than smaller ones.
Torque is roughly equivalent to acceleration, and in this respect, the Subaru Impreza Outback Sport is considerably more powerful than the Suzuki SX4.
Torque equals pickup, and the Impreza Outback Sport will have picked up and gone by the time the Suzuki finally gets moving.
Comfort
While the front cabin in the Subaru Impreza Outback Sport offers a bit more head room than the Suzuki SX4, there really isn't much of a difference.
The ampler interior dimensions of the Suzuki SX4 make it significantly roomier for your passengers than the Subaru Impreza Outback Sport.
Warranty
The Subaru and the Suzuki SX4 have the same basic warranty.