I was originally gonna make this a three-option thing, but there aren't any mech games on PCE Hucard format that can hold a candle to either of these games, in my opinion. Veigues is great, but it's a completely different kind of game.
I picked these games because they are, I believe, the best giant robit games on their respective consoles that I own (otherwise, Metal Warriors would have likely taken the #1 spot on the SNES.)
Before I say anything about either of the games, I'd like to hear some of your opinions.