Did somebody call? LOL.
The differences between the Durango and Explorer come down to the ride and fit and finish. The explorer also starts out a couple of grand more expensive then the Durango. The Durango also has the 3.6, which is a Wards 10 best engine several years running. The difference in MPGs is only 1, the Explorer gets 19 city 27 highway and the Durango gets 19 city 26 highway. From what I've experienced, the Durango is a much more planted feeling vehicle, and it drives more like a luxury car than a typical SUV. Then of course you have the optional 5.7 Hemi which totally changes the feel of that vehicle.
Another good option if you're needing a third row is the Chrysler Pacifica. It's crazy roomy, also uses the 3.6, has active noise cancellation standard, comes well equipped at a very reasonable price, looks great IMO, drives awesome, has the Stow N' Go, etc. If you haven't considered one, do yourself a favor and look at one. They're very nice, and unlike any minivan on the market.