Didn't cross shop the Durango. However, I did end up with one as a rental recently for a week.
As far as looks, you'll have to get the r/t for it to look good, otherwise, Explorer wins.
They say the interior is more roomy, I didn't feel that was the case at all. The finishes and construction of the Ex are far superior.
Garmin nav is just that, a $100 Garmin unit slapped in the dash. It works, but graphics and functionality are lacking. Doesn't have the finished look of the MFT system. I've not had any of the nav issues with the Ex that others have had, so I like the Ex's nav. I wasn't impressed with the rest of the U-Connect system either, it's extremely simple, yet not intuitive to navigate.
The ride and comfort were not even close to the Explorer. I was extremely happy to turn that rental in and get back to my Ex waiting for me at the airport.
Not sure what any of this is worth, but observations none the less.