That information is definitely not available, besides, Apple sources their components from a variety of manufacturers (including Samsung). They are also exclusively for Apple's use and contain proprietary firmware developed in cooperation with Apple. That explains their utter disinterest in user-installed modifications.
The OWC drives are definitely out of my price range for replacement of an otherwise functioning SSD.
I realize they are expensive. They are also worth every cent. I have yet to experience a single failure with any of them, and even the oldest ones are running as well as they ever did.
Will that continue, and for how long? Who knows. Considering many hard disk drives don't last as long they've paid for themselves many times over.
You—usually—get what you pay for. By comparison, Samsung's "EVO" models are junk out of the box. Maybe people install them in Windows PCs, never expecting to get more than a few years of life out of them anyway, but I wouldn't know. PCs are junk out of the box also.
OWC's are not the only SSDs that work well. Complaints about Crucial SSDs are also unheard of; I just don't happen to have any of theirs. There are other models including Intel or Vertex (Toshiba) and I have not heard of any complaints with them either. For whatever reason though, the "EVO" is just notorious.