It doesn't matter what the tire size is compared to duration. It's the tire compound, pressure, weight, road, etc..
MT's are loud on the road. Some louder than others, but in general, they're noisy on the road. They're designed for offroad use, and are not that great on the road in the line of traction, especially wet/icy roads.
AT's attempt to blend offroad ability with on-road manners as well. They're not great off-road, but will suit most considering most miles are always on the road. They're considerably quieter on the road and offer better traction in bad road conditions.
I have Nitto Terra Grapplers, TSL Boggers, and BFG A/T KO on our vehicles. The Boggers suck on the road, and will get chewed up prematurely because that's not what they're designed for. The BFG's are loud, but have good tread wear. The Grapplers are the best tire I have for the AV, and have over 40,000 on them now, with maybe 10-15K left.
It's all a matter of what you need. The MT's look cool, but I don't need the noise. I'm too old for that cr@*. The Grapplers fill my needs, as well as the fenders.
