The tone is much more official and adapted to the subject as well as the format of the writing. Being an article in a professional magazine, the language is much more accurate and standard, while addressing an issue that relates to the core nature of her assignment as a professor. The second reading on the other hand has a more literary approach, while fully analyzing and conceptualizing aspects related to the teaching environment. She analyzes several pieces of literature and the way these adapt to a different, modern environment with hypertexts. The change is usually rather dramatic because it is not only the literature that must adapt but also the requirements from the readers. One cannot expect to consider different types of literature as appealing in the technology era compared to the era of printed books and materials. The literature and the approach have changed to keep up...

This is not necessarily part of literature but it is an adaptation from the old fashion printed messages, one which tries to constantly stimulate the market and in full competition with one another. The tone of this writing, as mentioned, is much less professional and rather more similar to literature, yet maintaining a certain sense of didactical and professional feeling of the writing.
References

Hayles. Katherine. "Writing machines." Cambridge, Massachusetts: MIT Press, 2002.

Hayles, Katerine. "Hyper and Deep Attention: The Generational Divide in Cognitive Modes." Profession. 2007. Available at http://engl449_spring2010_01.commons.yale.edu/files/2009/11/hayles.pdf