Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. The Saturn Sky is substantially cheaper to get to the dealership than the Porsche Boxster.
With respect to MSRP, the Porsche Boxster costs tremendously more than the Saturn Sky.
Utility
The Porsche is a better choice than the Sky as far as hauling capacity, especially if you often need to carry a lot of loot or pets.
The Boxster and the Saturn can accommodate the same number of passengers.
Dimensions
The Saturn is somewhat more ponderous than the Boxster.
Your wallet will hurt more every time you fill up the Porsche than the Saturn Sky because of its bigger tank.
The Saturn Sky and the Porsche Boxster compete for the same parking spaces.
Handling
The Porsche Boxster and the Sky have approximately comparable tires.
With their comparable turning radiuses, the Saturn and the Porsche Boxster quite certainly handle approximately the same into and out of tight spots.
Drivetrain
The Saturn's engine is tremendously smaller than the Boxster's. Note that smaller engines can be stressed more; on the other hand, smaller engines typically get better gas mileage.
Torque is the force that lets you accelerate quickly, and in this respect, the Saturn Sky isn't much more powerful than the Porsche.
Overview
The basic warranty that comes with the Saturn Sky isn't quite as generous as the Boxster's.