Usually it’s the actual ball joint placement that changes, like they move it in or out or rotate the mounting cup. That being said, usually you can visually see a difference if you over lay them one on top of each other.
All the photos, both stock and mopar, seem ok though? I’ve seen way worse lol.
I’m curious about this though, I just bought a procomp kit for my Rebel and plan to install the preload for now, and switch to Kings later, but either way keeping the truck 7-7.5” and I’m leaning on the ready lift arms right off the bat. But I’m curious about these mopar arms.