a large amount of gun crime is drug/gang related, also, our population is so much higher. Gun crime in the US is about twice as high(per capita) as in Canada, that is mostly due to the gun control in canada. However other crime statistics are worse in canada, such as assault, where a person is nearly twice as likly to be attacked. Also rapes per capita in Canada are more then twice as high as the US.
So in the end crime is about the same, it just takes different forms.
my source was
www.nationmaster.com