Which is what? Don't leave us hanging in two inconsequential areas.
I have never been told that there is one "correct" brand, but I do know people that believe that china sould be made by a respected manufacturer of either English bone china or French Limoges. Sometimes china from other parts of Europe is considered acceptable, but china that is manufactured in the US, Japan, China, etc. is not okay.
Please note that I do not ascribe to this postition and am not advocating for it--merely confirming that there are plenty of china snobs in the world.