The armoured transport is spot on, good solid Outcast feel with a pretty fearsome looking front profile.
The battle transport has a decent set of features, especially the battering ram looking front, but to my eyes is a little too rectangular and a few more engines than appears necessary. I'd suggest more of a protruding front and perhaps condensing the four middle engines into two larger ones. Another idea could be to make the cargo section into a hold rather than boxes and have the rear section with a ramp looking texture at the back.