Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. The Mitsubishi Eclipse Spyder is markedly cheaper to get to the dealership than the Porsche.
As far as MSRP, the Porsche Boxster costs tremendously more than the Mitsubishi Eclipse Spyder.
The Mitsubishi Eclipse Spyder is tremendously less costly than the Boxster when it comes to out-the-door cost.
Utility
The Porsche Boxster's more sizeable trunk will accommodate more massive items than the Mitsubishi.
The Mitsubishi Eclipse Spyder will indubitably prove handier than the Porsche Boxster for those of you with frequent kid-cargo.
Dimensions
The Mitsubishi Eclipse Spyder is considerably more ponderous than the Porsche Boxster.
The Porsche Boxster's tank is roughly the same size as the Mitsubishi Eclipse Spyder's, though the Mitsubishi Eclipse Spyder's is a tad larger.
The Porsche Boxster and the Mitsubishi Eclipse Spyder compete for the same parking spaces.
The Porsche's shorter wheelbase will likely give a more maneuverable feel in daily traffic. On the flip side, the Mitsubishi is likely to have a smoother, more stable ride.
Handling
With its rear-wheel drive layout, the Porsche Boxster likely has better dry traction than the Mitsubishi; on the other hand, the Mitsubishi's front-wheel drive layout likely provides better traction in rain, snow or ice.
The Porsche Boxster has markedly wider tires than the Mitsubishi Eclipse Spyder. Note that wider tires could improve handling, while smaller tires could improve gas mileage.
With its tighter turning radius, the Porsche Boxster is definitely more maneuverable than the Mitsubishi, something to consider if you do a lot of city driving; on the other hand, remember that a vehicle with a tight turning circle may feel a bit twitchy on the highway.
Drivetrain
The Mitsubishi Eclipse Spyder has a more sizeable engine than the Porsche Boxster. Note that smaller engines typically get better gas mileage, but a smaller engine usually has to work a little harder.
The Porsche Boxster has no lessons to learn with respect to torque from the Mitsubishi Eclipse Spyder.
Overview
The basic warranty that comes with the Porsche Boxster isn't quite as generous as the Mitsubishi Eclipse Spyder's.