Short barreled SBR's that fold up or break down can also be had in rifle rounds. Even more practical for me. Just my preference.
Foldable battle rifles that can fire in that position are easily double the cost of these PCC's. So there is some difference. And they're still bigger in most cases.
But I hear what you're saying.
The Scorpion and the B&T being able to fire multiple rounds while still folded is a huge plus for me. Since I carry it in a backpack and may not have time to deploy the stock should it be needed.