Connecting "Paper Style" with "Web Style"

Paper style is all I know and I have not even perfected that yet. I have never had a reason to consider the elements of web style until now. My introduction to it has been through SpiderPro's Styleguide and Lynch and Horton's Web Style Guide. At the risk of sounding contradictory, I was surprised to learn both how similar and how different paper and web styles are.
One similarity between the styles is the necessity to write appropriately for the reader. The very first SpiderPro tip is "Do know your audience." They go on to say "Write and design with your visitors in mind. Don't get tempted to write for yourself." Lynch and Horton offer a similar tip when they write "Web sites are developed by groups of people to meet the needs of other groups of people." They expand on SpiderPro's quick advice by explaining that sites need to be suited to the individuals intended to use them. The same is true of paper style: writing style has to be tailored to the reader or the work will not succeed.
Another similarity between paper and web styles is the need for clarity. Part of achieving clarity is to consolidate information and, to this goal, SpiderPro's guide suggests not to "split topics." Lynch and Horton make this connection between paper style, web style and clarity when they write "We seek clarity, order, and trustworthiness in information sources, whether in traditional paper documents or Web pages." They proceed to make several suggestions toward making a web site with the utmost clarity for the user.
The major difference in paper style and web style is how clarity can be achieved. It isn't exactly simple to be clear on paper, but there is a built-in order to it. The writer begins at the beginning and fills pages that will be read from front to back in a physically ordered sequence. Web sites have no such implicit order. SpiderPro's and Lynch and Horton's web style guides devote many of their tips to navigation, the way clarity is achieved on a web site. Both of the guides have sections about setting up your web site so the user can find their way through the information provided. The tips in both guides focus suggestions foreign to paper style such as ways to keep the user from getting "lost" in the site. In a paper document, all that is required is a page number...links are as simple as flipping a page.
Another difference I found interesting between paper style and web style is the "updating" both guides suggest. I was fascinated because the idea is that returning users to a site expect new material and changes where this is almost impossible with a work on paper. There is a permanence to paper. Once something is committed to the print form, it will remain the same unless it is republished, but this almost never happens. I imagined all the authors who might wish to revisit a work and "update" it according to any new thoughts or insights they wish to add. Web sites are so instantaneous, that changing them is a reasonable expectation.