I personally like the Toyo M/T's better! They seem to have less road noise then the Nitto's. They both seem to wear very well. However, both perform very well off road!
I have put several sets of these on trucks over the years and get to see them come back to the shop so either one is a good choice!
I'm running the Nitto Trail Grappler's right now. I love how they perform off- road, especially in the thick mud that likes to cake onto tires. They clean themselves very nicely. On the road I do get a good bit of noise though, personally I like it. But that's just me.