What are the taxation benefits of Australia country bias for Australian tax payer?

Many people around the world tend to bias their investments for their home country. A quick check finds that Australia is less than 1% of global GDP. If you have more than 1% in Australian equities, then you are doing home bias. I would say many, if not most people in here fall under this category from what I see in comments. What are the taxation benefits of investing in Australian equities vs International? Also does this change for super vs non super holdings?