Depends on what you mean by durability. I've blown through multiple pairs of convertibles by using them more or less constantly (hike every week) and sitting on logs and granite a lot.

So I have a pair of 5.11's (heavy nylon ripstop) and several of the light soft convertible pants. For on trail, straightforward stuff where I'm going to have something to sit on I wear the lighter pants. If it's a light pack, cross country, brushy trip I wear the 5.11's.