Pre download Xbox Series X games

Since you have Assassin's creed Valhalla pre-ordered for xbox one you'll be able to download the game for no additional charge on the Series X

I’m confused how will it work for both if one is physical and the other is digital

Both consoles are digital...it's just the Series S is Digital only whereas the Series X is both Digital and Physical.

75th Anniversary Edition Pre-Order can be downloaded to the Series S, the Series X and the Xbox One

I have the Xbox one X project Scorpio, I was told that the game can be downloaded in any serie X or serie S (included mine), thanks for the help!!

Game can only be downloaded on a Series S and Series X, but not an Xbox One X. Xbox One X is not the same as a Series X.

You are misunderstanding how it works

You can pre-order games all you want doesn't mean you can download and play series s/x consoles games

Xbox one games are just xbox one games it doesn't matter which xbox one you have all xbox one games work with xbox one

This is why series consoles are labeled series not xbox one series s

According to the page for "Sherlock Holmes Chapter One Deluxe Edition Pre-order":

https://www.xbox.com/en-gb/games/st...ter-One-Deluxe-Edition-Pre-order/9NX9KNX36D7H

That game is listed as for both the Xbox One and the Series X/S. Basically, you order it and then the system employs what is called "Smart Delivery" to determine which console you have and download that version accordingly. So you would play the XBox One version on your current console and then, as mentioned by the IA, if you bought a Series X or S and installed the game, it would install the "Optimised for Series X/S" version on that console