Australia would have less crime per capita, guns or not.Ultimately you have to ask yourself this basic question; Why does the US have so many more gun murders per capita than other comparable nations? The answer is obviously more complex than "lots of guns" but you can't dismiss that fact from the equation.
Australia averages 1 gun related homicide a week. 21 million people, about the population of Texas. 1 a week.
Canada has lots of guns but little crime.
It's not the guns. It's the murderers.