Vehicles have headlights at night, and the 3D units are equivalent to Total Annihilation's units. I like the tanks, which are modeled to look like the early WW I trench crawlers that have two cannons sticking out each side. The friendly move AI is good. Collision handling is excellent, as I've manuevered big masses of units through bridges with no problem. The enemy AI is bad.
Units simply wander around until they spot a target to shoot at.
This happened twice for me, and each time I had to blow up the HQ and lose the sector to end the combat. You can bandbox select, but you can't assign the group to a hotkey. Fortunately, the default of selecting a gaggle of units and clicking on the nearest enemy works fine. The 3D terrain has no effect on combat, either for height or for defense. Another major faux pas that everyone has commented upon is the slow load time to go between the strategic and the tactical maps.