It’s the same demo that was released in early 2008 for PS3 and 360, the only difference being turbo mode available in the options menu.
Not many differences from the final version apart from the tutorial screens, and orbs locations. Most of Nero’s moves are not usable, the only skills he has other than his basic moveset is:
Red Queen Combo C
Streak lvl1
Charge Shot lvl1
Snatch lvl1
Exceed/EX-Act lvl1
Enemy Step
Split/Double Down