Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. It costs roughly the same to get the Vibe to the dealership as the Kia.
The Kia Spectra is markedly less expensive than the Vibe when it comes to MSRP.
Utility
The Pontiac Vibe and the Kia Spectra can accommodate the same number of passengers.
Comfort
While the front cabin in the Pontiac offers a bit more head room than the Kia Spectra, there honestly isn't much of a difference.
The Pontiac Vibe is not particularly more spacious for your passengers than the Kia Spectra.
Dimensions
Both the Pontiac Vibe and the Kia Spectra are likely to feel a bit sluggish because of their high horsepower-to-weight ratio.
The Vibe's tank is about the same size as the Spectra's, though the Spectra's is slightly more capacious.
The Kia Spectra and the Pontiac Vibe compete for the same parking spaces.
Performance
Both the Pontiac Vibe and the Kia Spectra are likely to feel somewhat slow because of their high horsepower-to-weight ratio.
Handling
With its tighter turning circle, the Kia Spectra is quite certainly nimbler than the Vibe, something to consider if you do a lot of city driving; on the flip side, remember that a vehicle with a tight turning circle may feel a bit twitchy on the highway.
Drivetrain
The Pontiac Vibe and the Kia Spectra have similar-sized engines, with a slight advantage to the Kia Spectra.
Overview
The basic warranty that comes with the Pontiac Vibe isn't quite as generous as the Kia Spectra's.
As far as warranty against corrosion, the Vibe has considerably better coverage than the Kia.
Other
The Kia emits fewer smog-forming pollutants per 15,000 miles than the Pontiac Vibe.