The Series X is better in nearly every way. I have my Series X in the living room and then a One X near my computer. I’ve started bringing the Series X in here when I play. Series X has FPS boost, an SSD stock, and quick resume. I added an SSD to my One X and the Series X is still so, so much better. You mention wanting to play Forza. The Series X runs it at 60fps whereas the One X runs it at 30. For a racing game, the difference is absolutely massive.

Now, it’s hard to me to recommend an Xbox at all in the year 2026. I’d probably say get a PC at this point, or a PS5 if you really wanted a console for a bluray player.