Oh, I guess the cars are rated by the manufacturer for the North America market in general, and not different for the US vs Canada?
I assumed that Canada would get the same ratings as the UK given it's a Commonwealth, but I guess I was wrong. The North America vs rest of the world rating difference is real, though....tons of articles and videos about it.
Sorry to lead you astray and get your hopes up, @Maple Syrup Actual.