Oh, and one important one. Canadian salaries for urban areas will look slightly higher, but it's more expensive to live in Canada. Check rents, costs of living, groceries, alcohol, tobacco prices, and taxes. You're looking at about a 10-20% increase in cost of living, but its offset by lower population densities and people who tend to be more relaxed.

Also, since Canada has a reputation as "free health care for everyone everywhere!" look into that, too. It's not free. Check the health care plans with your employer.