Atturo Trail Blade XT with it's less aggressive structure provides better dry and wet pavement performance and the tire is pretty great with fuel, ride comfort and snow performance. On the other side, the Nitto Ridge Grappler features superior off-road traction, on gravel, rocks and muddy tracks. And on-road, you'd be impressed with it's stability, given it's a more aggressive rugged terrain tire.
Cooper Discoverer ST Maxx although is slightly more voided, it's mud traction is on par compared to it's counterpart. Other than that, the tire yields better traction on snow, comfort, and on-roads, its a better tire to have on wet roads (though overall, comapred to other options available, it's not so great). The Nitto Ridge Grappler on the other side, is overall a better tire to have on dry roads, as it's great with traction, noise, fuel and tread economy. And off-road you'd get a better performance on sand and of course rocks, where it shines the most. (I rated this tire for rock traction, in my list of top all-terrain tires).
Comparing both tires, you'd see that the Kanati Trail Hog A/T has better performance when it comes snow traction, and on road comfortability (though don't get me wrong, by comfort, I only mean it offers better cushioning of the bumps, and the tire is pretty loud). On the other side, the Nitto Ridge Grappler does better on roads, but that only goes for dry environments (Trail Hog is better on wet pavements). Other than this, the tire stays unbeatable when it comes to climbing on rocks.
Milestar Patagonia MT is better in dirt, sand, and mud tire, which is not surprising at all, given it's a mud-terrain tires, though it's rocky terrain traction is only marginally better here in comparison. On the other side, the Nitto Ridge does better on pavements, comparatively, it's fuel consumption is better, it provides superior winter traction, ride comfort and traction wise, its great especially when it comes to steering response (both in wet and dry).
So overall, it all comes down to this, the Nitto Trail Grappler being a mud terrain tire is a much better fit when it comes to rugged terrains, including sand, mud and even rocks (though with a close margin, I should add). The Nitto Ridge Grappler on the other side, is a better tire for pavements, it shows superior traction, dry steering response, winter traction and on-road comfort.
Cooper Discoverer STT Pro features a superior traction off-road overall. Surprise, surprise. The tire does best on sand, and mud, though on rocks it's only a little better off the two tires, according to my tests. Nitto Ridge Grappler on the other hand, features a better on road traction and comfort, combined with fuel economy and tread wear.
Out of both tires, the Pro Comp AT Sport provides better highway performance in terms of noise, comfort, fuel and tread life as well as traction. On the other side, the Nitto Ridge Grappler provides superior off-road grip on rocks, sand and mud filled tracks. So its basically better overall off-road, and I guess you saw this coming, right?
So overall it comes down to this, the Mickey Thompson Baja MTZ being more aggressive features a superior traction on sandy, rocky and muddy terrains, and although its on-road traction is good enough, it's still lacking here. On the other side, the Nitto Ridge does better on highways, in both wet and dry environments, though it's wet traction is nothing to be proud of. Moreover, the tire features a more comfortable ride, give better fuel efficiency, and takes more time to wear off completely.
Goodyear Wrangler UltraTerrain AT being a less aggressive tire off the two, yields a superior traction on both wet and dry roads. Moreover, the tire also does a lot better in terms of other on-road performance metrics, including snow traction, tread wear, fuel efficiency, and overall ride comfort. In comparison, the Nitto Ridge Grappler features superb off-road grip, where it shines the most on gravely and dirt filled roads. And it's sand and mud performance is also worth noting.
Cooper Discoverer Rugged Trek is a very weird tire, when you compare its inner and outer construction, internally it's built like an on-road tire, and from outside, its aggressive enough to be called a hybrid. So it gives a mixture of traction on and off-road. Off-road, its great with mud and gravel, and sandy, and on-road it offers decent wet grip and bumps absorption capabilities. BF Goodrich KO2 on the other side, provides much more durability, and with it, rocky terrain traction, it's a better tire for dry roads, fuel consumption, and tread wear, and yields a quieter ride.
Out of both tires, the BFG KO2 is a tougher tire bringing improved off-road traction to the table, may it be mud, rocks, sand, you name it. Though it does that by ensuring the highway grip stays in tact (but that only goes for dry roads). The Wrangler UltraTerrain on the other side, renders a better wet gripping design, providing amazing resistance to hydroplaning. The tire is also very fuel efficient, and comfortable as well, but could use a little more tread life.
Kumho Road Venture AT52 overall is better on-road tire, though off-road you do get one area where it beats it's counterpart, and that is sand. With the newer tire, Kumho added some really unique sidewalls which provide that traction. And on roads, you get better dry and wet grip, fuel economy and comfort, though tread life is same on both. BF Goodrich KO2, on the other side, features superior traction on rocks, provides ample mud traction, and on-rods, its dry grip and noise dampening abilities aren't too far off form its competitor.