Retails are likely made in China. People knock on things made in China and although there are some pretty shitty quality things coming from China, or dollar store stuff, the products coming from China from big names have pretty good QC. I would imagine the retails look way better in terms of fit and finish. From pics I've seen it already looks way better in terms of stitching, lack of glue residue, etc.
Attention to detail is definitely something the Chinese are very good at... And reputation. All those factories probably fighting to get the contract to make products for diff companies.