Can someone explain to me how the tone and presentation of the various presentations differ from one another? For example, like CBC news has a completely different tone compared to a personal blog. What makes them different? Their position? Point of view? or something else.
Yes, there is a difference. Remember that media is entertainment. Different news programs, and even news channels, have their own target audience. The tone of the program will be designed to attract that target audience. For example, FOX and CNN may report the same story in different ways.
When analyzing any kind of presentation (let's call it "text," meaning both written and visual, and the multiple genres within) the most important question that should be answered is: What is the purpose of this? This question can be best answered by looking first at the following:
- Who is the author?
- Who is the intended audience?
- What is the context?
You are correct about "position" and "point of view" as two points of difference. This takes into account the background and experience of the author(s) and their biases. Because no matter how hard an author may try to be completely objective, it is next to impossible to produce something that is 100% free from opinion, especially if part of the overall purpose is entertainment. Also, different media outlets have a very different targeted audience, and an audience also comes with its own set of background experience, biases, and personal opinions.
Even if you were to compare one news station against another, like Fox News to CBS, you would see that the above questions apply, and make these networks very different from one another. Fox News is generally known for its more conservative reporting and favor more "right wing" politics, while CBS is considered more liberal, with more favorable reporting toward "left wing" politics.
Looking at news networks versus completely different media outlets only raises the differences in the questions above. An ordinary blog, for example, does not go through the same standards of editing and revision that a program from a professionally produced network news station (or a professionally published magazine or newspaper) goes through. Both the writer and the audience are aware of this. As such, the blogger is allowed to be far more opinionated, possibly more controversial, and certainly more conversational in tone, because his audience does not tie his name to a bigger corporation connected to industry standards.
These ideas merely touch the tip of the number of ways different media outlets differ from one another, and why.