The hardware is stronger than Xbox Series S but weaker than base PS5. It doesn't even get close to PS5 Pro. I recommend watching Digital Foundry video about it.
This article is pure sensationalism and speculation. The reason GabeCube's hardware is mid is because it was made with affordability in mind. It's supposed to be cheaper than if you would build a regular PC with similar specs. Expect something around $500-$600 price point.