I have owned both Dueler M/Ts, A/Ts and BFG A/Ts and M/Ts.
Currently I have the Dueler M/Ts and I love them. It is a great tire... for a Mud. The Dueler or BFG A/Ts are better tires on the road, better in the sand and snow, and are alot quieter.
The Dueler M/Ts are smoother and quieter than the BFG M/Ts. Around town they have a mild hum to them, but handle excellent for a Mud and are very good in the wet. They also have a long tread life.
On the highway they hum moderately, but are ALOT quieter than Pro Comp Muds (very loud) and a bit quieter than the BFG M/Ts. Holding a normal conversation, or listening to the radio is not an issue at highway speeds. Steering response, as expected, is a bit sluggish.
Off-Road the Dueler M/Ts are awesome, however, I haven't tested them in snow or mud yet. In dirt and rocks, I love them, very sticky, with a nice sidewall pattern.
Here are some pics:
I highly recommend the Duelers and would buy them again. Hope this answers your questions, feel free to post with any more questions.
--Sean