The Hovertanks.Longer gun and clear, ducted fans.
The Helicoptors. The original was a traditional gunship looking similar to an Apache. The new one is a definite imitation of a Scorpion from Avatar.
The 'Mobile Units'. IFV's. The 1986 version closely resembles a Spanish BMR-600 Pegaso while the updated version is something like a M1131 Striker .
The Bombers. The original seems to be based on a XB-70 Valkyrie while the new version is a B-2 Spirit.
The Infantry. The original was basically a human shaped blob w/ some generic gear and a gun. The new one is laden w/ pouches, gear, a huge backpack, radio helmet and what looks like an M41A Pulse Rifle.
The new partisan has a turned around baseball cap, 8 ammo pouches, bunches of other pouches attached to his arms and other places, knee, shoulder and elbow pads, sundry other gear (but no canteen or backpack) and an M-4gery. Note the proper finger placement on the trigger.
I'ld say that's a statement on the changing firearms culture in the US.