I think we've interpreted their post in different ways, but I don't see how my interpretation is incorrect. I know the history and geography both fairly well. The post said the difference is "especially in HK", and referenced the British influences on their culture. It also said HK is distinct partly due to language (Cantonese same as Guangdong, no mandarin unlike Guangdong, with English unlike Guangdong), partly due to history (was under British rule for 150 years).