Lower dash pad

What is the difference between a 68 and 69 B body non rallye dash lower dash pad? Also, my 68 came with a lower dash pad that did not have the fake stitching but the glove box door has it. Why is that? Any assistance you can provide will be greatly appreciated!

'68 Plymouth lower pad has a cutout to the right of the switch plate for either a filler panel or center AC vents.
Non-AC '69 car will be solid there.
I don't recall if the simulated stitching was dropped on the '69 cars.
Pretty sure it's on the '68s, I can check my '68 later.
For the '70s those were non-padded plastic.

Thanks!