I have also wondered what the difference is.
I'm referring to this other model:
Apple MacBook Pro (16", Intel Core i9-9880H, 16GB, 1000GB, SSD)
The difference is probably the manufacturer's number and thus the keyboard:
For the article here it is MVVK2D/A and the one at the link above MVVK2SM/A. I'm no expert on Apple manufacturer numbers. But the front digits MVVK2 are the same for both. If I search for MVVK2D, I come across German pages, if I search for MVVK2SM, I come across Swiss pages.
So I would guess that it is exactly the same notebook, but this one (MVVK2D) has a German keyboard, and the one at the top link (MVVK2SM) has a Swiss keyboard.
