I'm fairly sure they'll do better off road than the terra grapplers, they have some 1/2" deep tread and decent amounts of open tread, I guess you'd call the large gaps. seen them in person at a shop, I actually thought they were tighter tread pattern and not so deep tread... I'm almost positive those 2 things alone work for better grip offroad in conjunction with the compound. and they look WAY more of an offroad tire than the Terra's up close with their on road design lugs and tread pattern. I don't even consider street tires like terras for my truck. not even an option, they're ATs and are made for pavement regaurdless of what anyone says about their offroading. you want REAL offroad tires, they're purpose built and usually made of a sticky compound and wouldn't last 10,000 miles on the street... so that being said, if you want mud you tires you get swampers, mild offroading you get a crossover tire (Dura, ProC X-AT, Truxus MT or STS to name a few) or of you Baja you'd probably like BFG-TAs or possibly the Maxxis stickies or something... the guys who run ATs imo, are guys who don't want noise, don't really offroad, and probably live in a city somewhere and can afford a big truck with a semi-aggressive look. not putting anyone down. I live semi-country, we're kinda 3rd world actually... have a horse and will probably get a boat and quad a little down the road and actually do a healthy amount of off roading... enough rock crawling to tear my gas tank skid plate bolt heads right off and have it bend back *big accomplishment for some 1/16 sheet metal
* and kinda destroyed the front OR skid as well
left it at my buddies house where he said he'd cut it up for his buggy possibly down the road, but the buggy has 1/4" diamondplate so I dunno what he'd do with the pos stock OR skid
anyway, not trying to razz the terra here, like I said different strokes for different folks, just that I don't see the Dura being a more street tire than a Terra is all... it's more of a xover tire like the pro comp xtreme AT, with fancy looks as previously stated, I don't plan on running them, but may down the road depending on costs and how much mudding I do this year as I'm sure they'll be fine over rocks which is where I do majority of my offroading...