I own all three and would have to strongly suggest that you include Forge of Freedom in your available choices. Great depth, infinite play options and enthralling combat models makes it the most complete WANA game to date. For example, I believe there are something like six different siege options. Now that IS control.
As Joe has already stated, the 'battle meter' and lack of tactical control put me off in AACW. It just wasn't immersible enough for me. I might add though that others seem to really enjoy it.
Either way you go I don't think you can go wrong but, you should really consider Forge of Freedom.
We must act... against the Sioux, even to the extermination of men, WOMEN and CHILDREN.The more Indians we can kill this year, the less will have to be killed next year. They all have to be killed or be maintained as a species of paupers.- w.t. SHErMAN