HELP Identifying Rear Qtr Panels for Convertible '68 Barracuda

Hi All ... My build project is moving along while my bank account shrinks. Paint is done and needing help sourcing rear qtr panels. One of our members was gracious enough to pull ones he had in storage out (see pictures). The aftermarket ones are designed for convertible Darts and "can work" but are not apparently a proper fit, per Laysons and ClassicIndustries fitment notes.

So, the other member and I are not clear what the real difference is or if that matters. Hoping one of his 3 pair is for a Bcuda and that someone out there can look and verify?

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