The first things that jump out are the large and uneven gaps between words and the “color” variations among paragraphs. What I mean by the “word-processing layout strategy” is the algorithm where, when you run out of space on a line, you simply break the line at the end of the previous word, fill up the space (for justified text) by expanding the spaces between words, and begin the next line. When you get to the end of the paragraph you go on to the next one. The TeX layout engine, in contrast, makes several passes over each paragraph, adjusting the line breaking (including hyphenation) in order to optimize its appearance (which includes such things as trying to avoid successive hyphenated lines); then, when the page is set, it goes over the entire page to try to equalize the density, or color, among paragraphs.
