The Best Spinner does not create content. You create the content and TBS then creates lots of different versions of it.
ArticleBuilder makes functionally unique content but unless the blog is of pretty low quality I'd not use AB content unless you are also adding other content to the site as well.
So, if you want to start with nothing and end up with something then ArticleBuilder is absolutely the way to go - just don't make the mistake of thinking that it replaces content written by people specifically for your site. It can create great filler content and is wonderful for back-linking projects but it does not replace authors!