Site Collection Vs Hubsite

Question

How do you relate Site Collections with the new Hub sites?

Are they fundamentally different or just an old wine in a new mug?

Answer 1

Actually, the Hub site is considered a top-level site collection for other site collections to serves the flat structure, unlike the old Site collection and its subsites structure!

the Hub site has the below characteristics

• Created from a team or communication template,
• Only created by admin,
• Only available in SharePoint online.
• Preferred to use with the modern site experience.
• It's only allowed to create 100 hub sites in your organization.
• You can search for all sites content below the site hub.
• Easy navigation for all sites below site hub.
• Easy to show and roll-up content from all sites to the main hub.
• No permission inheritance from the hub to other sites, every site has its independent permission settings

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So it's fundamentally different from the normal site collection!

Hub Site

Site Collection

You can read more about How the Hub site is working at Planning your SharePoint hub sites.