Labels saying "Export Quality" or "Export Grade" are common on fruits, wines, meats and other agricultural products. They imply that consumers abroad get to enjoy the cream of the crop, while those at home are left with the run of the mill.
Have those who are familiar with the scene in the places that are the sources of most WGs in Hong Kong, e.g. Guangdong, Hunan, Guangxi and Sichuan, noticed any difference in looks or service between the short-term WGs in Hong Kong and those who stay home to serve the domestic market?