Nice take on the Quasar. The proportions look much better than the earlier Quasar sketch you posted. I like the subtle outlines you used. I'd lose the tank though. It doesn't seem to be drawn to the same standard as the VT and it's placement in the composition is kinda awkward.
The thing that gets me is that the new Steel Battalion, by the look of the trailer, looks more like a title called Ring of Red which features diesel powered mechs from an alternate 1940's that relied on regular troop squad support. A great if unknown PS2 game in its own right, yet Xbox owners get pissed off when I try to talk about it.
Ring of Red? Its been a while but it was set up like an strategy RPG so playtime's around 30+. If you have a PS2 there's proabbly a good chance of finding it at a game store for $10. Ebay will certainly cost you more.