Hi
Is it worth upgrading from the One S to the Series S, or maybe not?
Would scores in Rocket Leauge or Fifa in Game be adopted?
Not really. The xsx would be more "worth it".
Yes, it's always worth it if you don't need a disc drive.
I bought a Series S and it's a massive improvement in terms of graphics, performance (many games that previously ran at 30FPS, now run at 60 FPS, e.g. Sea of Thieves) and load time.
At first I made a conscious decision in favor of the Series S and against the Series X and the PS5, although I had saved the money for all three consoles because I won't be buying a 4K TV in the near future anyway.
Scores are all transferred without any problems. Rocket League also runs nicer and smoother than on Xbox One.
But: If you have games on disc, you can't play them because the Series S has no drive!
It would also be important to say that the internal SSD storage with just 364 GB available is very small in contrast to the specified 500GB.