User blog comment:Meighan/Tracking Contributions: Recent Activity/@comment-957747-20110923181128/@comment-957747-20110923182855

The default feed only lists the last 50 (or so) changes, but it shows a 'diff' of what was changed. It would require CSS (like RC) to make the changes stand out (default CSS has no selectors for the RSS feed) It's useful to see what was changed at the same time as who changed it without having to go to the diff page to view the changes. It also gives you a link to the page if you want to view the full page instead of just the changes. Another perk is the fact that you can subscribe to the feed and get updates on changes to it as well.