I use both. They are differences between them so I think both have different traffic. (I don’t check my stats much).

GSiteCrawler will help you generate the best Google Sitemap file for your website. The GSiteCrawler uses different ways to find all the pages in your website and can generate all sorts of files, statistics and more. The sitemaps file format has lately been also adapted by Yahoo! - even MSN/Live.com is pledging it's support.... A free software tool to make SiteMaps, Google, Yahoo, ROR and HTML

__________________
Dominate Google Search Results Pages
Business Support A Computer Portal