There are multiple implementations of SOLID server https://solidproject.org//self-hosting/css https://solidproject.org//self-hosting/css what you are linking to

There are multiple implementations of SOLID server https://solidproject.org//self-hosting/css https://solidproject.org//self-hosting/css what you are linking too is other implementation that inrupt sells to big corps as a product. I assume it has a lot more functionality for management of users stuff like that. But the pods them selves work the same.