The characteristics of websites are as follows:
1. The main difference between a blog and website is the communication style.
A website is a one-way noticeboard communication style. Consequently, websites are page based structures ie. based on static pages with content that rarely, if ever, changes. Most of these mock websites will have a static front page rather than having posts appearing on the front page.
A blog is designed for interactive communication. Blogs encourage conversation, websites do not and that’s why businesses and professionals with websites are adding blogs to them, and sometimes forums and wikis as well for complaint handling, customer feedback purposes and for collaborative purposes.
Blogs publish current news with date and time stamps, most websites do not. Blogs are post based structures ie. based on dynamic posts that are frequently updated with new posts appearing in reverse chronological order with the most recent post on top. The information most websites provide is static, rarely updated, and the sites are often poorly maintained.
A wordpress.com blog can be restructured to resemble a mock website (CMS - central management system) and function like one as has been previously described to you. Websites cannot be restructured to function as blogs do to resemble blogs, and that's why those with websites add blogs to them ie. to provide for interactive communication.
2. Almost all websites feature custom image headers and a horizontal menu for static page access and sub-page (child page) access, because they are page based structures.
Those wordpress.com themes that lend themselves well to being restructured as page based mock websites are the ones that allow for custom image headers, and also have horizontal menus for dispaly of static page tabs and dropdowns to sub-pages (child pages). The theme you point to Quentin is not among those that lend themselves well to restructuring as it lacks both of those features.
The background color of the Quentin theme can be easily achieved by adding an image to any wordpress.com theme that allows for a background image to be uploaded into it. The fonts on any wordpress.com theme can be changed to the same ones used in Quentin by using Typekit Fonts. Nothing else about that theme is unique.
Quentin is designed to be primarily used for blogging. It is meant to be easy to read, quick to install [wordpress.org version being referred to here] and quick to use. As such, there are no fancy “drop down” menus in the navigation or customizable headers. No configuring of typefaces. No uploading of your logo. ... It’s an old-fashioned theme.
3. Blogs have RSS feeds, websites ALONE do not have RSS feeds.