More show, less talking and interaction, basically. I think at least. Others with more knowledge I'm sure will correct me.
Farangs are looking for sex. They want to walk into a go-go bar, and have 30 relaxed, smiling guys in white briefs who are available to sit with them, have a drink or three with them, chat and get to know each other a little, and be offed at a reasonable price.
Chinese are more interested in a gay sex show, then leaving by themselves, hence drinks go up to ridiculous prices.