Cost
Regarding fuel economy, the Chevrolet has the Pontiac Vibe beat.
Producing a precise gas mileage evaluation is so hard that some think not even the federal government can do it, but it looks as though the Chevrolet Cobalt is the winner when it comes to gas mileage.
The Pontiac Vibe is considerably costlier than the Chevrolet Cobalt in terms of MSRP.
The Chevrolet will save you a lots_of_money at the pump every year compared to the Pontiac Vibe.
Utility
Neither the Chevrolet Cobalt nor the Pontiac Vibe has a marked advantage when it comes to seating capacity.
Towing is significantly more the Pontiac Vibe's forte than it is the Chevrolet's.
Convenience
You will definitely have to visit your friendly gas station more often with the Pontiac Vibe than with the Chevrolet Cobalt.
Comfort
Taller drivers will significantly enjoy the extra head room in the Pontiac's front cabin compared to the Chevrolet Cobalt.
The Pontiac provides more head- and leg-room to your passengers than the Chevrolet Cobalt does.
Dimensions
The Vibe and the Chevrolet Cobalt compete for the same parking spaces.
Handling
With their comparable turning circles, the Chevrolet Cobalt and the Pontiac Vibe most definitely handle about the same into and out of tight spots.
Drivetrain
The Chevrolet Cobalt's engine is substantially more sizeable than the Pontiac's. Keep in mind that bigger engines may use more gas than smaller ones.
Torque equals pickup, and the Cobalt will have picked up and gone by the time the Pontiac Vibe finally gets moving.
The Pontiac Vibe could learn a lesson or two from the Chevrolet Cobalt in terms of torque.
Warranty
The Pontiac and the Chevrolet have the same basic warranty.