I guess it boils down to customization. After you build a couple sites you pretty much know which elements you want to include on a site. I would be interested in knowing whether or not SS can incorporate files on a private host server? For example, I have a dreamhost server that I use, if I have a javascript file that I want my SS site to load then can I just call up the file in SS and incorporate it however I would like to? If I can – then SS may take a little more work but it could do anything WP could. If not – then SS is a lot more limited than WP and they’re not even comparable.