https://wccftech.com/xbox-series-s-game-install-size-will-be-30-lower-console-wont-hold-back-next-gen/

One of the main drawbacks of the Xbox Series S is its smaller storage space, which is exactly half that of the Xbox Series X (512GB versus 1TB). In fact, in a recent episode of our Wccftech Talks podcast, Keith pointed out that he would recommend getting the Xbox Series X just because of this.

However, in an interview with IGN, Jason Ronald (Microsoft’s director of Xbox program management) revealed that game install size on Xbox Series S could be around 30% lower than on the larger Series X. This should definitely help offset the smaller storage space a bit.