I think brands are more confusing than helpful. Behind most brand names what we'll actually find are testing, marketing and distribution companies. I think Samsung is one of the few exceptions. Most others source their chips from the same three or four producers.
Even if you are loyal to a brand, the actual producer can and likely will differ from one model to the next. Sometimes even a single brand model will incorporate chips from multiple producers (per production run), typically when one producer can't fulfill new orders but a competitor with a similar enough product can.