Hi Dave
Unfortunately don’t have the Pa4x to compare it too.
When switched off, has similar look ? to pa3x screen. (Certainly not the same sort of screen as an iPad.)
When switched on, that’s a different matter, much nicer display than pa3x.
Personally not having any problems with the touch response. Quick tap and up it pops.

Found this comparison on the different display types , doesn’t mean much to me personally except for the mention
of “OLED “ on the Genos in the SUB display?
No idea what a sub display is, but having bought a 65 inch OLED tv the other, wow it sure makes a difference to the color and clarity.
The main display seems to be the same except for size on the Genos ( 9 inch display) and sx 900 ( 7 inch display)

———————
Pa3X 61: Resolution: 320 x 240 pixels - TFT Color TouchView Graphic Touch Screen

PA4X. 7” Wide capacitive color TouchView™ TFT display


Sx900
TFT Color Wide VGA LCD Size 800 x 480 dots (7 inch)

Genos
Main Display : TFT Color Wide VGA LCD | Sub Display: OLED (Live Control view
Main Display : 800 x 480 dots (9 inch) | Sub Display: 589 x 48 dot