This difference is from links. Traditional essay has no link. There is only one way to read that is reading everything through all of essay. Opposite from traditional essay, hyperessay is multiple-link. There are many links in each page to other pages in the same essay.
Some essay can link to outside pages, written by other writers, too.
Because of this reason, there are many ways to read, depended on which link that each reader want to see and choose. The readers can control which information they want to see and how to order them. Due to the first difference, it makes these 2 essays has different meaning, too. The meaning is depended on the way and order to read. Traditional essay has only one meaning because it has only one way and order.