This Xbox Game Pass is a standalone Xbox Game Pass used for consoles only, whereas the Xbox Game Pass Core can be used for both consoles and PC gaming.
The Xbox Game Pass offers a wider selection of unlimited access to over 100 Xbox One and Xbox 360 games, with new games added monthly. It also grants users access to exclusive discounts on the Microsoft Store,
The Xbox Game Pass Core is an new evolution of Xbox Live Gold, granting access to online console multiplayer, but a smaller selection of unlimited access to a catalog of 25 high-quality games to play on Xbox Series X|S and Xbox One consoles (versus the Xbox Game Pass which offers over 100 Xbox One and Xbox 360 games). Like the Xbox Game Pass, the Xbox Game Pass Core also grants access to exclusive discounts on the Microsoft store as well.