What difference can you identify physically, Hassan? A clear feature comparison will help the seller's technical person answer more than the suffix question
Ask them to identify the delivered adapter and compare it against the accepted fixture revision, Hassan. Purchasing shouldn't have to invent the missing assembly drawing.
A rotated fixture also belongs to the person loading and maintaining it, Hassan; the supplier cannot settle those tasks by turning one shape on a drawing.
Keep your designer's comparison with that request. If they propose a changed arrangement, its complete routing and handling need review, not only a claim that the mounting holes align