I would consider this a dress boot (regardless of the fact that it is shell), and would wear them with a suit.
These I would not consider dress boots, but they would be fine with a blazer and casual trousers/chinos, even a tweed or wool).
I would consider the EG Galway in the same style genre as the boot above.
The Vibergs on 2030 are not a true work boot per se, but I bet they would fare pretty well in a work environment.
They are definitely more sleek than some of the other last boots from Viberg.
If comparing Viberg boots and the like (Nicks, Whites, etc), the 2030 lasted boots appear to be the most sleek/dressy out of the bunch.
To call them a dress boot in their own genre is not unacceptable.
However, if comparing to some of the more formal boots (such as the Carmina Bal above), they are not true dress boots.