Here are some explanations ,I don't know this could help you or not ,because I didn't find English version :http://wenku.baidu.com/link?url=U8scbF7bjRsiIVbAl8_iaC8_mhSLIGDz8yiR947kNUE70-FNfrl-i8Cs97zbjkTY0I8Oixd6mDUZAbluPHxeg0ALAkyrMQy_id6SQnsQ9Tm
I think the biggest difference is Chinese garden pursuit pleasure of the natural,but the western garden requires natural needs compliance with certain rules .