Utility
Neither the Toyota Matrix nor the Saturn Astra has a marked advantage as far as seating capacity.
Dimensions
The Saturn Astra's tank is roughly the same size as the Matrix's, though the Toyota's is a little larger.
Convenience
You won't have to visit your friendly gas station more often with the Toyota than with the Saturn Astra, because both offer comparable mileage ranges.
Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. It costs about the same to get the Saturn Astra to the dealership as the Toyota Matrix.
When it comes to gas mileage, the Saturn Astra beats the Toyota Matrix.
The Toyota Matrix pales in comparison to the Saturn Astra regarding gas mileage.
The Astra is substantially less expensive than the Toyota Matrix with respect to MSRP.
Warranty
The Saturn Astra and the Toyota Matrix have the same basic after-sale protection.