@Patman99: Well I'm a Canadian temporarily living in the US and I see a minimal difference in culture from the places I've stayed (aside from our far superior candy and politics). I suppose, though, it would greatly depend on which area of each country your perspective comes from. For example, I'm not exactly in the bible belt states here. And I didn't grow up in the Yukon either. But then I'm also never identified as Canadian until I myself point it out. lol. ;)
As for the so called 'rivalry', I still say it stems from a place of not knowing. Not everyone in Canada says a-boot and lives in a campground and not everyone in the US is flag wearing and gun toting. I think the biggest similarity is in the country wide diversity of both places. ;-)
But I digress!
Poutine, Naniamo Bars, and Montreal Bagels. Lobster, Moxie, and Whoopie Pies. =D