I have not yet tried Wordpress.com, but I have my sites on the Wordpress.org platform and it is by far my favorite. Blogger is made to be a blogging platform -- and that's it. WordPress is an extremely flexible platform that, with the right know-how, can be made to look like any kind of site and do just about anything that other sites can. Do a search for "powered by WordPress" and see what kind of sites come up, you might be amazed, it is not just a blog platform, and Google's algorithm loves it. In comparison, I was severely underwhelmed by Blogger -- it's great if you want a sign-up-and-go kind of thing, but it's so limiting in what you can do with it.