Hua Hin’s population is about 80,000 residents, with an estimated 3,000 to 5,000 expats, and it welcomes about one million tourists per year. Pattaya, on the other hand, is at the center of the Pattaya-Chonburi Metropolitan area, with an estimated one million residents, including 180,000 foreigners, and entertains 10 million tourists annually
Does that explain it?