I have used a bunch of different boots. And the boots that are more rubbery like easyboots grab rock better, but the renegades are by far the best for use.
On summer pack trips I noticed that when crossing big slabs of rock the barefoot horses do good, as well as the ones with boots, however did have some shod horses not only slip but fell down a few times. They just can't go where the renegades can. And the renegades were the non studded ones. Trust me it was getting annoying trying to find trails for some horses when others had freedom to go wherever
Another plus I noticed when riding in the really rocky areas like creek beds was that the back of the renegades protect the heel bulbs too, which ended up being a problem for horses not wearing them they all had swollen ankles while the renegade horses didn't.
As far as wear goes they do wear out faster on rock and asphalt, if you ever did ride on a road with boots just walk because a trot or lope really eats at them fast. Rocks though are nowhere near the wear of asphalt. That being said I have been really suprised at how long they have worn so far. The boots are estimated to give 300-600 miles. I put around three hundred so far and they don't hardly look worn. I expect six or more.