trail grapplers are one of the quietest mud tires and have long wear life, i have ran both and yes the terras will last a little longer but will suck compared to the trail traps if you hit mud. They are both E rated so if you tow, it won't matter which tire you run.

I am currently running the Dune Grapplers, look killer and hook up good on the street. Not sure how they work in the dunes lol.