This recent Gartner report from Feb 2018 gives an overview with great graphics to add to your blogs or to your knowledge and if you have any questions on clarification on these companies, let me know as I have studied them for a while. There’s definitely overlap in services, but some have carved out their own niche and one is not necessarily like the other.
- The Fundamentals of Hyperconverged Infrastructure
- Hyperconverged Infrastructure for Dummies