The main similarities between QE in Australia, the UK, Japan, the Eurozone, and the USA are that they all involve central banks purchasing government bonds or other assets to inject money into the economy. This is done to stimulate economic activity, increase liquidity, and support financial markets.
However, there are also some differences in the implementation and scale of QE among these countries. For example, the specific assets purchased, the timing and duration of the programs, and the overall size of the QE programs can vary. Additionally, the specific goals and objectives of QE may differ slightly depending on the economic conditions and policy priorities of each country.
Overall, while there are similarities in the general approach of QE across these countries, the specific details and nuances may vary.