said 10 months, 2 weeks ago:
@sailorine The main difference is that a WordPress.com blog is hosted on WordPress.com itself. WordPress.org allows you to download the WordPress software for free and install it on your own domain. This means that you have full control over everything – functionality, themes, whether or not ads are on your blog, etc. Plus you don’t have to worry about breaking WordPress.com rules and having your blog taken down – you just have to abide by your domain hosting rules which are usually more lenient unless you’re promoting adult content, online pharmacies, casinos, etc.