What kind of ships are Vivacia, Paragon etc?

['thul]

interesting question...

that has never been made entirely clear.
Most likely (beyond the obvious differences) they most likely do not quite match any Tellus ship class.

They are considerably larger than longships (as the designs for the six duchies warships are basically). Since they are pre-cannon era, they cannot be extremely large. They are deep-draught and have several cabins as well as at least one deck. Thus they have to be decently sized.
Since there's not made any point of them being in possession of multiple internal decks, they are not too tall.
It would appear, though not entirely conclusively, to only have one mast, maybe two. Thus, they might match schooners in size. Hard to say though. Their development ship-tech-wise is obviously above that of pre-cannon ships on Tellus, yet there are no cannons.
Galleys were sufficient to be a menace, so they can't likely be like the greater schooners. (more than 3 masts)

the Captain of the Ophelia speaks of carrying "a" spare mast. 'thul would guess that multi-masted ships might likely carry multiple spare masts, though the need is not as great when there are no cannons to easily shoot out the mast.