I have the X-S10.
The BIGGEST gripe I have with it is I cannot center the focus point with the stick. There is a separate button (DISP/BACK) below it, which is flat to the body, so I can't feel it under my finger. I have to use that to center the focus point. Not sure if they changed this in the X-S20. The sensor is the same for both, so the IQ is the same.
That is my biggest gripe with the camera, of course, single card, no weather sealing, flip out screen, pop up flash, IBIS, PASM dials, a dedicated one just for film sim if you like (I love it).
X-S20 also has the new Fuji battery and UHS-II. As I only need mine for travel and family. the X-S10 can be had for like £600 is much better value IMO.
The take away feeling is that when using it, even though it is APSC, the experience of it feels like I am shooting FF.