i have lived in Colorado USA for a year and found out that i love to live in cold snowy places. therefore i decided to apply for Canada. Australia is a nice place with warm coastal temperatures. but since i have lived in such weather i dont wana try it again
the good point for Australia is there immigration system is very fast compare to Canada but the bad point is, it is quite hard to get a job there. if you google Canada and its provinces, you will find job portals for each and every province. which at least gives a good sign that they have good job market. i did not see any such thing in Australia.
P.S: my observation is purely based on what i have searched on internet on both countries for a past whole one year. plus friends who have been living in Australia.