1. Exclude China. Among men, who is better Europe or Asia? Answer is I would say that there is some edge to Europe. Not true for women.
2. China is unique in that they are about the only place in the world that literally turns children into professional players, sending them to almost full-time training facilities by age 10-11, where they live on-site, and pretty much only play TT, with very little school. This does not happen anyplace else. China devotes an order of magnitude more resources into TT than any other sport. There are coaches everywhere. Places to play everywhere.
3. As for cultural aspects -- the idea that Asian parents demand more excellence blah blah blah -- this is complete nonsense. If that was true, China would always win in all of the sports they undertake. But they don't. The best football is in Europe and South America. American women have dominated in gymnastics over China for awhile now, and that is a sport that demands every bit as much dedication as TT. That is just one example. China is great for the same reason Americans dominate in basketball. They care about it more than anyone else, by far. Like American basketball, they produce more high level talent than can ever be needed to fill professional rosters.
4. There is no one "Asian style". CNT coaches would not like Mitzutani (fishes too much, gives up distance form the table way too easily). Or Matsudaira (no power at all). Or JSH (they have not tolerated choppers in decades, but Korea still produces them). Or RSM (penholder, but no reverse backhand). ON the CNT, those guys might have never been seen in a Pro Tour event.
5. Because the Chinese are so dominant, there is not just one thing you can point to about their games that is better. It is probably a little bit of everything, among other things, being pushed all the time by their teammates at every level.
6. People copy in sports. Chinese coaches realized some advantages to the way the best European players were playing in the early 90s. Chinese players rapidly evolved. European coaches are not stupid, and they can see what Chinese players do, and they can do their best to emulate it -- but within the financial and infrastructure constraints that they have to live with, including the fact that nobody even in Europe puts a whole lot of money into the sport. I think the differences are in how people play will diminish as time goes on.
7. One thing I do notice, is ZJK, ML and FZD seem stronger from very close into the table than their European counterparts and that gives them an advantage. Guys like Mattenet, this why he will never beat any Chinese player in a Pro Tour event.