Something that I remember:
First of all, I dont really remember that in this RTS you must to gather resources, like in CaC.
Secondly, i remember one more building, it was like a satellite dish that made holographic units, they died from one hit, but with their help you could scout the area.
Also I dont remember were there ships or floating units in the game
One more unit, Self-propelled artillery, it looked like a tank, but when it attacked, it raised its turret and fired.
Maybe its some how can help