Handling
With its tighter turning circle, the GMC Envoy is quite certainly sprier than the Dodge Durango, something to consider if you do a lot of city driving; on the other hand, keep in mind that a vehicle with a tight turning circle may feel a bit twitchy on the highway.
Drivetrain
The GMC Envoy's engine is a bit smaller than the Dodge's, but not terribly so.
Torque equals pickup, and the Dodge Durango will have picked up and gone by the time the Envoy finally gets moving.
Utility
The Dodge Durango will most definitely prove handier than the GMC Envoy for those of you with frequent child-cargo.
The Dodge Durango is likely a better choice than the GMC Envoy in terms of transporting cargo, especially if you often need to carry a lot of suitcases or large animals.
The Dodge outpulls the GMC Envoy by a massive margin.
Convenience
You'll likely take the GMC for a fill-up about as often as the Dodge Durango.
Comfort
While the front cabin in the Dodge Durango offers a bit more head room than the GMC Envoy, there really isn't much of a difference.
Dimensions
Your wallet will hurt more every time you fill up the Dodge than the GMC because of its bigger tank.
The GMC Envoy and the Dodge Durango 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 Envoy is considerably cheaper to get to the dealership than the Dodge.
Producing an accurate fuel economy evaluation is so hard that some think not even the federal government can do it, but it looks as though both the GMC Envoy and the GMC Envoy perform roughly comparably regarding fuel economy.
As far as fuel economy, the GMC Envoy is somewhat better than the Dodge Durango, but not by much.
The Dodge isn't much less pricey than the GMC Envoy with respect to MSRP.
Warranty
The Dodge Durango and the GMC Envoy have the same basic after-sale protection.