I would say the New Alliance, out of the three Euro-East, New Alliance, and Sino-Russ Blocs. 

New Alliance is North America, plus partnership with parts of Africa, India, Australia, and smaller island nations/states. They're the more material, hard military, preferring tanks, kinetic weapons, etc.

Euro-East is the Bloc with Europe and the Middle East, with religious stability, mind you. They hold a good portion of the general manufactory, and have extensive research into self-sustaining energy sources, and energy weapons of various kinds. They're more likely to have mechs and powerful battlesuits. 

The Sino-Russo Bloc is the Chinese, Japanese, and the Russians, as well as smaller satellite states. They have a more rounded technological base, with more focus put on remote control pieces and cybernetics and the like. They're the only ones to possess neural processors- they replace your brain with a computer, if they want. You're still you, just faster, smarter, and with internet access. Makes you more susceptible to EMP like of stuff, though.