Handling
With their comparable turning radiuses, the Mercury Mountaineer and the Subaru Tribeca most definitely handle roughly the same into and out of tight spots.
Drivetrain
The Subaru Tribeca's engine is somewhat smaller than the Mercury Mountaineer's, but not terribly so.
The Subaru has no lessons to learn with respect to pickup from the Mountaineer.
Utility
Neither the Subaru Tribeca nor the Mercury Mountaineer has a marked advantage when it comes to seating capacity.
Towing is considerably more the Mercury Mountaineer's forte than it is the Subaru Tribeca's.
Convenience
The Subaru Tribeca's fuel tank will need to be replenished more often than the unit in the Mountaineer.
Comfort
While the front cabin in the Mercury Mountaineer offers a bit more head room than the Subaru Tribeca, there really isn't much of a difference.
The Mercury offers more head- and leg-room to your passengers than the Subaru does.
Dimensions
Your wallet will hurt more every time you fill up the Mercury Mountaineer than the Subaru Tribeca because of its larger tank.
The Subaru Tribeca and the Mercury compete for the same parking spaces.
Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. The Subaru Tribeca is significantly cheaper to get to the dealership than the Mercury Mountaineer.
Regarding fuel economy, the Tribeca is a bit better than the Mercury Mountaineer, but not by much.
The Mercury Mountaineer isn't much costlier than the Subaru Tribeca when it comes to MSRP.
Overview
The Mercury Mountaineer and the Subaru Tribeca have the same basic warranty.