your second question, I don;t have any Whitepapers or research, I am not sure why you would assume that members here wold have such things handy. You seemed to have missed a simple point already mentioned in the OP's article.
google comparison between tracked and wheeled apc's, and go through the links, you will get an Idea.
You are not required to be sure why I would assume anything, or is that a pressing personal need ? I did miss a point mentioned in the article. But is that a crime ?
Now how about that google comparison and sharing the details ?