FlatPress Forums

In Hubert's World, if I am not wrong there seems to be 2 sitemap plugins:

http://hubertsworld.prince.homedns.org/2011/04/18/flatpress-plugin-dynamic-sitemap/

http://hubertsworld.prince.homedns.org/2011/04/24/flatpress-plugin-more-changes-to-the-sitemap-plugin/

I have a small doubt - both seems to have different directory names and both seems to be different in function - so should I use both or should I use just one? In such a case which one should be used?