Vietnam was a French colony for a long time. France entered Vietnam from the west, so French culture has a greater influence in the south of Vietnam from Nha Trang to the west. The famous city in the west of Vietnam is Saigon, now Ho Chi Minh City. During the Vietnam War, the US military also used the western city of Saigon as the rear base to advance deeper into the country. At that time, Hanoi was always within the sphere of influence of the Vietcong. Since Saigon was greatly influenced by the West, both the city and the planning were higher than Hanoi. Since Saigon was deeply influenced by the West, the city's humanities, geography, eating habits and thinking are more Westernized. Hanoi has always developed under the background of socialism, and the city is closer to the taste of China in the early 1990s. I hope my answer can help you.