If I recall, it was from a game, wasn't it? Where it was used as a colony ship?
I doubt that the Raven (a science vessel) is well suited to establish and/or supply colonies!
Perhaps based on the same spaceframe, but I think any differences would be enough to justify calling teh science vessel variant a different class name to the colony vessel variant.
(Of course, I have an agenda here - in my fanfic "The Hansen Diaries" I've named the Raven an Armstrong class vessel! :P)