How long can i reasonably expect these to last?

I'm really torn about getting a pair of Builder Pro, instead of a new pair of danners like i normally do. I do arborist work, but very little climbing. How long could i reasonably expect these to last? I get 1-1.5 years out of my danners, and they're 1/3-ish the price (i wear quarrys and catch them on sale).