I have only spent five hours on the clock, and tried the training and online multiplayer. The graphics is phenomenal with a lot of vivid details. There are 40 multiplayer maps. Many of them allow you to set the current weather conditions, and the objects show up accordingly. Developers in their video interview are very proud of the graphic presentation of explosions, smokes, could, sunshine, ..etc, and I see why.
Online gameplay is smooth. The battlefields are decorated with all sorts of things. Character movements are very life like. The motion sensor controls are interesting, but can be not so responsive.
The multiplayer maps are big and packed with features like drone order (which lets you spy on enemy territory that finally reveals their exact positions on your first person view), teammate view, injured and wait for medication or die and spawn now, ..etc.
But for me who enjoy the upclose duel with enemies in Resistance Fall of Man's Nottingham map, GRAW 2 instead is somewhat slow. Some maps seem to be huge enough for 32-64 players (but only 16 or 32 supported, not sure), so players like to be snipers. Accuracy is highly emphasized (also better than Resistance), but there is no knife or punch. Slow running, small figures in first person views, and lack of knife/punch is why I'm taking one star off GRAW 2. Also to me, Resistance wins in the online gameplay fun factor if watching how you gun down the enemies up close is what intoxicates you.
It does let you carry a rifle, a handgun, and two kinds of grenades. Weapon change takes about 2-3 seconds, which is closer to the real situation.