The drive from BKK to Hua Hin is very long 3H plus sometimes 4H so Pattaya is way ahead regarding travel time I agree. So for people who travel regulary from BKK, Pattaya may be the better option. HH is way quieter then Pattaya so better suited for me, especially if you like to ride your bicycle in a quiet countryside instead of fighting for surrival the first 10K in Pattaya.