Understanding Compliance Between Microsoft 365 Commercial, GCC, GCC-High and DoD Offerings

Thank you for these blog posts.  This is the most detailed explanation on the different tenants I have seen. 

FedRAmp Moderate Equivalency Question.

The chart and article states that Office 365 is FedRamp Moderate "equivalency" in Microsoft 365 Commercial.  On the FedRamp website for Office 365 Multi-Tenant and Supporting Services for Public Cloud it states that it is FedRamp Authorized.  Why is Microsoft calling it equivalent and not authorized?  When a customer is looking for FedRamp authorized services this is the source they would use. 

https://marketplace.fedramp.gov/#/product/office-365-multi-tenant--supporting-services?status=Compliant&sort=productName&productNameSearch=microsoft