I think the problem stems is that the Sweetwater no longer carries the multifit case.
They now only sell the vintage case which is the one you have.
I have bought five of the Multifit, and they are nice.
Not sure why Sweetwater quit stocking the Multifits.
The "vintage" case is the multifit case... And it isn't a Sweetwater PRS case, just a PRS case carried by Sweetwater...