The first one I have, the Aeon... it's not textured yet, however.
The second one is a class 9... I have that one as well... I don't think I textured it yet, I think I only have the Delta Flyer and the Type 2 textured so far.
Yes, the Ent-J will look more like the G.
Most shuttles are going to be so small it will be difficult to tell exactly what they look like while they are flying around... but the shipyard pics is where you will really get to see them.
We are going to be a bit more size-true then default EVN, but we still have to fudge a bit, because we can't make, for example, the Borg Cubes as large as they really are. It would take up a screen that was bigger than mine (1440x900)