My initial thought is that they are all coming from the same place in China. Are you looking at the full floor and trunk pan or just the floor pan? I think you can focus on lowest delivered cost. I've bought two full floor pans, both were the same. I don't remember what the boxes said but both were bought through Dynacorn vendor.
1968 400 Coupe, verdoro green, black vinyl top, auto 1969 GTO Judge coupe, Carousel Red, manual 1971 Trans Am, cameo white, auto 1970 Buick Skylark Custom Convertible 350-4(driver), Fire Red, white top, auto 1972 Buick GS Stage 1, Royal Blue, black vinyl top, auto