Most brands are made in Foxcon anyways. I think it is the support and service that makes the brand.
This is not to say whether or not their service sucks- I've just never needed to interact with their service department.
And then there are ODMs and OEMs: ODMs provide the designs, OEMs mostly just stuff boards.
It's common to find products of different brands that look almost identical, because the chassis are the same while the bezels are different.
Dell for example is basically just a sales force with a catalog, not much different in principle from CDW.