I completely disagree.
I have spent a lot of time in Patong. In the course of 6 years, I spent a sum total of one year there. In the first few years, it was very easy to pull a decent-looking(a notch above avg) girl for 1000 Baht LT in the high season, which, unfortunately is the only time of year I can take off work. But by 2005, I really could not get better than avg quality for 1000, and from the comments I had on one of those girls, some would say below avg! The girls of the quality I had been getting previously, were 1500 LT in 2005, and usually, that required some haggling, as they were asking 2000.
I didn't usually go with stunners, but the times I did, I paid 2000 LT. They would not haggle, price was firm, and I would walk away from a girl at that price, if I did not think she was a stunner.
My impression is that the best-looking girls in Patong want to go with young men. If they are hard-up for cash they will compromise on age, but want more money, and still try to get the youngest guy they can pull, although that may mean going over 40.
In Patts, there are simply so many girls, and not enough young guys to go around. I can go in a gogo there and have young girls vying for my attention, happy to go with me for 1500, no haggling, and they treat me very well. These are girls who are better looking than all but the stunners in Patong.
In the beer bars, I can find girls who will go for 1000 Baht, who are better-looking than any girl I can get in Patong for 1500. The two I spent most of my last 5 months tour with, both were found in beer bars, and both went with me for 1000 per night. Both of them were a fair bit better-looking than any girl I have EVER had for 1000 Baht LT in Patong. They were not stunners, but were more than a notch above average. More like a notch below stunner.
I freely admit that it did take quite a bit of looking around to find those girls, as not every girl of that caliber in Pattaya will go with you for 1000. Most want 1500. But most of that caliber, want 2000 or more in Patong, if they will even stoop to consider going with me, which they will not, if business is brisk, with lots of young men around.
Simply put, my last two tours of Patong were spent with girls that were slightly above average at 1500/night. My last two tours of Pattaya were spent with girls who were way above average for 1000/night.
Also, you can get ST any time of day or night, any time of year for 500, with no haggling on Beach Rd. with avg girls, or sometimes above average, if you take your time looking.
So it is easy to say there is no difference in prices, because you can get girls in Patong for the same prices as in Pattaya. But, my experience is that, in terms of what you are getting for the price, the difference is like night and day.