Do you think the game is going well on the One S?
The Xbox One S is of course a bit weaker, so I'm not sure whether I should buy Biomutant
I only have one Playstation myself. But there are two versions of this console that differ in terms of performance.
With console games, I would never worry about a game not playing properly. Consoles are sold ready-made and it is the purpose of a console that you can easily play any game that appears on it.
I would therefore get Biomutant for the XBox One S without worrying my head. The game is sure to run smoothly