Here is a snippet of a conversation I had recently about why I use Radio over Manila:
The primary reason I use Radio over Manila is the capability of multiple-category posting. The fact that each category can be served up as an HTML page (even to a different server via FTP) or an RSS feed is wonderful, but I am most excited about the potential of the tool. I want to be able to designate a category that sends the content of my post to an email address. It could be an individual or a distribution list of some sort. Once I figure out this capability, my weblog tool becomes a much more robust part of my communication interface. Manila allows categorization via "departments", but only one at a time. Many of my uses for my weblogs demand the data be routed to multiple destinations. I'm hoping Manila inherits this capability from Radio soon... "