In the Popular Science article, the topic is covered more concisely and simply, whereas the Georgia Tech News article goes deeper into the analysis and provides more consequences of the results.
The Popular Science article is a lot shorter and looks less professional seeing as there are advertisements on the side and the article is basically a quick summary. It also relies more on pictures and videos to demonstrate the MuddyBot’s movements, whereas the Georgia Tech News article explains the movements and uses direct quotes from the actual scientists and project leaders.
Ultimately, the Popular Science article is lazier than the Georgia Tech News article. It’s purpose is to simply inform people of this experiment and its results. On the other hand, the Georgia Tech News article’s purpose is to both inform and explain the idea.