Both are great boots, but you have to keep in mind the design purpose behind these boots. These are cutting edge "Fast Packing" boots or "Trekking" boots in the more traditional sense. They are designed to be very light, very efficient walkers. To achieve this, Salomon is folding in ever more construction methods used for years in their very excellent trail runners. So, these boots are almost like running shoes on steroids. Durability will be a slight compromise, but anyone who understands what these boots are for, won't ever have a problem with durability. It's just going to be those who expect these boots to hold up like 5mm full grain leather mountain boots that will be disappointed, and unfairly so. For anyone doing a lot of off trail hiking, I wouldn't think either, or maybe any, of the Salomon boots would be the real go-to.
If uber fast, uber light, and uber efficient are the qualities you seek, either boot (maybe the Quest) would do the trick. If durability for rugged off-piste hiking is your concern, look elsewhere.