Post
Region: Scandinavia
The difference is in the names themselves. A dispatch can be thought of as a bit of information to be distributed widely. This may be something like an update in an ongoing war or a newly elucidated historical finding. A factbook is more a semi-permanent encyclopedia article. There is certainly overlap as dispatches can be referential, much like a factbook, and nothing is stopping a factbook entry from being a mere account of current events, but we find the above distinction to be popular, if not universal.