The difference between cloud nine.

The difference is that the cloud nine is the jade emperor's bedroom, and the heaven is the place where the jade emperor holds court sessions.

The ninth heaven is Tao Yang Palace, the living room of the Jade Emperor, which is located in the highest position among the thirty-six heavens. The highest place in Daluotian and Miro Palace is the Emperor's Lingxiao Hall, where the Jade Emperor commands all the immortals.

Heaven, correctly written as Heaven, also known as Tiangong, Wei Zi Palace and Zigong, is the highest ruling center in China folk mythology. For the record, the answer is for reference only. Please don't be blind and superstitious.