Those images represent two blog posts, they are blurred on purpose, I don't want to talk about the content, I want to talk about the presentation here.
The main difference between those two posts is the amount of text that goes into one paragraph. This has a direct correlation to the way that I read content.
The post on the left is painful to read, it has massive amount of text that I need to parse and read. I actually stopped reading it when I figure out that I was merely scanning it to avoid actually reading the content.
By reducing the amount of text per paragraph, you are making it easier to read the content, you let the eye skip to the next one naturally, instead of having to parse it.
Books can get away with it somewhat, because they have much higher resolution, but on the web, you cannot. You have to pay attention to the way you are writing.
Short paragraphs make it more pleasant to read the content. Dense content is painful to read, and it gives the feeling that it is dry, even if it is the most fascinating subject on the world.
And that was a whole post that could be surmised as "just hit enter more often, dude", sorry.