35-inch tires are usually designed with durability in mind and feature hard-wearing tread compounds and stiffer casings. So, they will provide much better treadlife when driven on more abrasive surfaces than smaller tires.
Moreover, thanks to the larger diameter, 35-inch tires turn at a lower rotational speed at the same vehicle speed, which should prolong treadlife even further. Not to mention, they are also more resistant to cuts and punctures in general, which makes them even more durable than regular tires.
However, the fact that these tires are used in more challenging conditions means that they won't last as long on average. For those reasons, some tiremakers don't offer treadwear warranties on those sizes, though most of them do today.