I wouldn't say that one or the other is more valuable when it comes to blogging. You want to show process, because that shows that you know your shit - but you also want to show end results, because that shows that you ship your shit (which is almost more important).

Having an active, well-written blog shows that you're passionate about whatever you're blogging about (or at least disciplined enough to write about it frequently), and helps you establish a reputation.