Cost
There honestly isn't much of a difference in gas mileage here, but if you must know, the Volkswagen Tiguan is a little more economical than the Hyundai.
The Volkswagen Tiguan doesn't pale in comparison to the Santa Fe as far as fuel economy.
The Tiguan isn't much pricier than the Hyundai as far as MSRP.
Utility
The Hyundai Santa Fe will definitely prove more convenient than the Tiguan for those of you with frequent kid-cargo.
The Hyundai outpulls the Volkswagen Tiguan by a sizeable margin.
Convenience
You will have to visit your friendly gas station more often with the Tiguan than with the Hyundai.
Comfort
Taller drivers will significantly enjoy the extra head room in the Hyundai Santa Fe's front cabin compared to the Volkswagen Tiguan.
The Hyundai Santa Fe is not particularly more spacious for your passengers than the Volkswagen Tiguan.
Dimensions
Your wallet will hurt more every time you fill up the Hyundai Santa Fe than the Volkswagen because of its larger tank.
The Tiguan and the Hyundai Santa Fe compete for the same parking spaces.
Handling
With its tighter turning radius, the Hyundai is definitely sprier than the Volkswagen Tiguan, something to consider if you do a lot of city driving; on the flip side, bear in mind that a vehicle with a tight turning circle may feel a bit twitchy on the highway.
Drivetrain
The Hyundai Santa Fe has a bigger engine than the Volkswagen Tiguan. Bear in mind that smaller engines typically get better gas mileage, but smaller engines can be stressed more.
Warranty
The basic warranty that comes with the Volkswagen isn't quite as generous as the Hyundai Santa Fe's.