Hi Bootcan,
Nice set of shoes you've got there. Obviously you have tried a pair or two, and you seem to prefer the heavier, full grain leather versions, with the classic roccia block sole from Vibram. Both solid and robust options. Diemme Roccia Vet is a lightweight boot, made primarily for city use. The boots are of first class quality, made of mostly italian components (except a few leather qualities from the UK and Switzerland). As some say, it is like putting on a sneaker. Not bad compared to an unlined Red Wing, for instance.
Anyway, comparing the quality of Viberg and Diemme is useless if you do not compare the product's purpose. For instance, I doubt that you can affirm that any Viberg boot is of better quality than this Siberia boot from Diemme: http://diemmefootwear.com/product/Tibet%20Brown . The boots gets expensive though, as the leather is 30-40% more expensive than the Horwean's you are quoting. Thus, quality is a matter of purpose, and the producers preferred retail price. In between you've got vanity, style, shapes and colours.
It's as simple as that.
Hike or die!
