The thing that i noticed is that, along with sticking to the rock to more easily climb, they steer better than the Rovers. There was one spot that was a narrow sidehill transition with a sharp right to a steep, narrow climb. The Rovers would push instead of steering, and I'd end up with the left front pushing too far and I'd have to do a dramatic recovery (it really looked cool) to make the climb. I pulled up to that spot with the Rock Beasts, and they tracked straight and true, lining me up exactly right.
My T1e Bully is dialed in to the point where it will make climbs at ridiculous angles if I can just get traction. My initial feelings of these tires is that I just improved the angle that I can climb due to the traction that I gained.