Awesome game, period.
The three factions uses different tactics and weaponry to accomplish their missions. The Americans, have the most advanced weaponry, such as the F-22 and the Paladin tank. the Chinese have technology that is much less advanced but makes up for its short comings with heavy firepower, such as the overlord tank. The GLA has the weakest of all armies, but the units are cheap and includes the suicide bomber, a great threat or nuisance depend on your level of development.
Overall, the game has continued the great legacy of the C&C series, and it lived up to the standards set up by its predecessors.