HK has its own beauty. The thing is that, in Hong Kong, everything there has a reason. The tunnels under water have a reason, the high bridges have a reason, the tall buildings have a reason. Whereas, in Dubai, most of the things are there just to add beauty. 
Btw, if you want to come to Dubai, do let me know. InshAllah in a week or so our own traveling agency would open in Dubai. 