I believe there can be a very grey line between what is news content and blog content.
Some sites use the blog components of a CMS to run an organisations official news output. Is that blog or news?
On a personal site are articles news or blog posts? The definition of news is not limited to content output from media conglomerates, you can have personal news too.
So yes News ≠ Blog and Blog ≠ News but it does depend!