Utility
Neither the Mazda CX-9 nor the Ford Taurus X has a marked advantage in terms of seating capacity.
Dimensions
The Ford Taurus X's tank is about the same size as the Mazda's, though the Mazda's is slightly bigger.
The Mazda CX-9 and the Taurus X compete for the same parking spaces.
Convenience
You'll likely take the Mazda for a fill-up almost as often as the Ford Taurus X.
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 CX-9 to the dealership as the Ford Taurus X.
The Ford Taurus X won't save you much money at the pump compared to the Mazda CX-9.
The Mazda CX-9 requires a lot of gasoline compared to the Ford.
In terms of MSRP, the Ford Taurus X costs approximately as much as the Mazda CX-9 (though the Mazda CX-9 is slightly cheaper).
Handling
With their similar turning circles, the Mazda CX-9 and the Ford Taurus X likely handle about the same into and out of tight spots.
Drivetrain
The Ford Taurus X's engine is slightly smaller than the Mazda CX-9's, but not terribly so.
The Taurus X has no lessons to learn regarding pickup from the Mazda CX-9.
Comfort
While the front cabin in the CX-9 offers a bit more head room than the Ford Taurus X, there honestly isn't much of a difference.
The Ford Taurus X is not particularly roomier for your passengers than the CX-9.
Warranty
The Taurus X and the Mazda CX-9 have the same basic after-sale protection.