You can use any font in your collection; you’re no longer limited to the fonts on your visitor’s computers.
A quick “View Source” shows that there are no extra <span> tags or id attributes in HTML. You don’t need to manage this method at all. Just add a single <script> tag to your document’s <head>, and you’re done.
Invariably, we need to change the content of our websites. Why spend time re-creating graphics to go along with them? With this method, just update your HTML, and the graphics are automatically updated as well.