No need for sources. people have taken photos of the subpixel layout and it’s like many oleds. 2 subpixels per pixel compared to the usual 3 subpixels per pixel (on all the other iPads).
This means that, assuming the resolution is the same or very close to the same, the old iPads will have a sharper image (higher “true” resolution due to more subpixels)
but here’s a picture in case you’re curious. It’s quite a disappointment that apple did not increase the resolution so that the new OLED iPads could look as crisp as previous ipad models. Sort of goes against the whole “retina” screen idea that they launched over a decade ago.
https://forums.macrumors.com/thread...m4.2426450/page-9?post=33150784#post-33150784
check this thread and you’ll see.