I like, I like
The first one is very good indeed. Its very remeniscent of the stlye used by V, so props for that. One thing that bothers me is that in the perspective view, the point where the cokckpit ends and the main body begins is not clearly defined. Maybe you were going for a Herc2 stlye smooth transition, but I think that a visible edge would work well with the overall blocky architecture. As well, the place where the the two meet, seems to fat to me. You need to trim it down. One more thing, the top "pod" just doesnt seem right to me. Its not the assymetry, I rather like that, but it sort of makes the whole thing too blocky. Maybe you need to make either the engines or the top missle back loinger than the rest, just so they dont end at the same place.
The second one I also like. It reminds me of that ship, I think its a Vasudan transport, I cant quite remember the name. The design, again, is very Terran looking. Again, it is a but too blocky. I think that if you increased the lenght of the ship, it would look less blocky. As well, like before, if you're going for assymetry, dont make all the components end in the same place. Make one longer than the other etc. The cockpit, also, could stand to be somehow better incorporated into the ship, but maybe its just the dark shading thats throwing me off.
Though that does sound like a lot of complaints, I really like the ships. If they were to be put into FS as-is, I would still like them

.
Keep up the good work