Social Bookmarking vs. RSS

The video and reading on RSS were very educational, especially for someone as new to all of this as I am. I have found using social bookmarking to be an excellent way to manage my research, which I am conducting on several topics. It has also opened avenues for finding more sources through others. Although I have not used a reader sight as of yet I will be subscribing to one very soon to see how that works out. From everything I have read and viewed so far there really shouldn't be a comparison or preference of using one over the other; it seems to me one could use both social bookmarking and an rss reader to complement each other. Like I said, I am new to this and I could be wrong.