Utility
Neither the STS nor the Cadillac CTS-V has a marked advantage in terms of seating capacity.
Performance
When it comes to horsepower, the Cadillac CTS-V packs quite a wallop and will knock the Cadillac STS down a few rungs. On the other hand, keep in mind that high horsepower engines often command higher insurance premiums.
Dimensions
The Cadillac CTS-V is significantly heavier than the STS.
The Cadillac STS's tank is roughly the same size as the Cadillac CTS-V's, though the Cadillac CTS-V's is a little larger.
The Cadillac CTS-V and the STS compete for the same parking spaces.
Convenience
You'll most certainly have to take the Cadillac CTS-V for a fill-up more often than the STS because of its tank size and gas mileage.
Cost
Producing an exact gas mileage evaluation is so tricky that some think not even the federal government can do it, but it looks as though the Cadillac STS is the winner with respect to fuel economy.
The Cadillac CTS-V pales in comparison to the Cadillac STS regarding fuel economy.
The Cadillac CTS-V isn't much more expensive than the STS regarding MSRP.
The Cadillac STS will save you a lots_of_money at the pump every year compared to the Cadillac CTS-V.
Drivetrain
The Cadillac CTS-V's engine is tremendously more sizeable than the Cadillac STS's. Remember that more sizeable engines may use more gas than smaller ones.
Torque is the force that lets you accelerate quickly, and in this respect, the Cadillac CTS-V is tremendously more powerful than the STS.
The Cadillac STS could learn a lesson or two from the Cadillac CTS-V when it comes to pickup.
Comfort
While the front cabin in the Cadillac CTS-V offers a bit more head room than the Cadillac STS, there honestly isn't much of a difference.
The STS offers more head- and leg-room to your passengers than the CTS-V does.
Warranty
The Cadillac CTS-V and the Cadillac STS have the same basic warranty.