1caa4152_O_Company___ShiftWeb_Solutions__WordPress_com
[WordPress.org] Full theme support and access A theme is a design you install for your website. Talented developers all around the world have created thousands of themes that you can choose from. You have the opportunity to install any of these themes! If you have development experience yourself, then you can create your own theme(s). You have full control whether you are experienced with web development or not. [WordPress.com] 
Limited themes You only have access to a limited number of themes. Although there are hundreds of themes available to choose from their database, it’s still a drawback for those who wish to be very creative or unique. As a developer, you can not design a theme and upload it here.
WordPress.org vs. WordPress.com | Atlanta Web Design & SEO Company | ShiftWeb Solutions
WordPress.com