Performance
In terms of horsepower, the Dodge Viper packs quite a punch and will knock the Porsche down a few rungs. On the flip side, note that high horsepower engines often command higher insurance premiums.
Handling
The Dodge Viper has significantly wider tires than the Porsche Boxster. Remember that wider tires might improve handling, while narrower tires could improve gas mileage.
Drivetrain
The Dodge Viper's engine is tremendously more massive than the Porsche Boxster's. Keep in mind that larger engines may use more gas than smaller ones.
Torque is roughly equivalent to acceleration, and in this respect, the Dodge Viper is tremendously more powerful than the Porsche Boxster.
The Dodge packs quite a punch compared to the Porsche Boxster when it comes to torque, which is roughly equivalent to acceleration.
Utility
The Porsche Boxster is likely a better choice than the Dodge Viper when it comes to hauling capacity, especially if you frequently need to carry a lot of luggage or sizeable beasts.
Neither the Dodge Viper nor the Boxster has a marked advantage regarding seating capacity.
Dimensions
The Dodge is markedly more ponderous than the Porsche.
The Boxster's tank is approximately the same size as the Dodge Viper's, though the Dodge Viper's is slightly larger.
The Porsche Boxster and the Viper 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 about the same to get the Porsche to the dealership as the Dodge Viper.
The Dodge is tremendously more expensive than the Porsche regarding MSRP.
Overview
The basic warranty that comes with the Dodge Viper isn't quite as generous as the Porsche Boxster's.