You make a good point about OPT, that is what I would call Optimum but Hyper Polish, Opti-Bond, Gloss Coat etc are called Optimum Car Care. The site shows they sell two different brands
One is CleanLab (which is not a brand I have heard of) and Optimum Car Care. which contains OPT products like Power Clean. Nano Wipes are in the Optimum Car Care listing.
You are right about the different packaging however OPT do have very different styles which seems to have built up over the years, for example Opti-seal packaging looks very different to Poli-seal and the regular contributors to this forum have a very good idea of OPT products but this will not be the case for most other people. If someone went to the European distributor (if one exists) for Meguiars and saw a a product called Meguiars Cleaner they could be forgiven for thinking this is a official Megs Cleaner. In fact, I would argue they have a realistic expectation they are buying something made by Meguiars.