What Iwrote on X-T2 forum:-
These are my opinions having shot with X-Trans2 since it was released and now having shot on X-Trans3 for a year. The images from an X-Trans3 are sharper (full stop), thus was brought home to me recently as I've recently shot over 1500 images on an X100F, the X100 series is not known for having the sharpest lens, I thought that the higher MP count if the X-Trans3 would show its inacquacies more, but this just isn't the case, I getting some wonderfully sharp images, and in fact I'm staggered at what this combo is capable of.
IMO a correctly exposed X-Trans3 image has very good shadow recovery, much better than X-Trans2, I know that there are some disbelievers about this but I have posted examples in the past on this thread, and my thoughts have been backed up by one of Fuji's X photographers who I had a long conversation with.I am very much a histogram shooter, and you really do have to make the best use of the sensor dynamic range (expose correctly) to get good shadow recovery.
I am also getting much better results at High ISOs, I'm regularly shooting at ISO6400 and finding that I have very acceptable image, something I couldn't do with X-Trans2, in fact one of my custom auto ISO modes on the X100F is 6400 with a min speed of 1/200, I've been using this as a general walkabout (Street,etc) as I know I can deal with the image noise, and it guarantees me a sharp image. Again making use of the histogram is important, under exposed high ISO images will always be difficult to recovery from.
Now they are just the X-Trans3 benefits, to which you can add higher resolution giving the option of more cropping variation.
The joystick, a dream to use, makes focus point selection very fast, so much so that I think I'd be hard pressed to buy a camera without this