Hmm, I can see the confusion: neither of the "norweger" boots appear to have "norvegese" stitching. Norwegian in style, but not in construction. They both appear to have a goodyear-type welt. The stitching on the vamp is different on each of them, one like Vass's regular "Norwegian" derbies (far left), and the other with a shorter "lake" and longer "split", and more prominent stitching, to the right of it, which I think is what they call their "Osloer" boot.
The big difference between them, apart from the stylistic variations in stitching, is the lasts. Far left and second from left are, I think, the Peter and New Peter respectively, with the latter much sleeker. For completeness, the black wingtip also looks like the New Peter last, and the brown suede/leather short wingtip looks like the "K" last.
Feel free, anyone, to correct me if this is all complete rubbish. It wouldn't be the first time. 
Edited by mimo - 10/16/12 at 4:28pm