I've always said Canada is just like America (where I was born and raised) if you just replace about 60% of the Starbucks with Tim Hortons and about 90% of the African-American people with Asian people. But really there are a lot more differences. It's hard to say if these are actual differences, because America and Canada both are such huge countries and different portions of each have their differences within the counties, and I've only lived in one little spot in America (all my life) and one little spot in Canada (for the last eight months). And it's hard to say one general thing about the US or Canada that's true all across the board, buuuut:
I think the old stereotype is true to an extent, people are more polite in Canada.
It seems that Canadians seem to be more musically inclined than Americans. I know few people in Canada that don't know how to play a musical instrument at least intermediately. In the US the inverse was true, I knew very few people that DID know how to play an instrument. I think that's why Canada is poised to overtake the music industry, IMO. And this has a lot to do with the education system between the two countries, and what is valued in which, but I digress.
Spelling is different, I can never get used to words like 'centre' no matter how hard I try.
Grocery stores are different. Most of my favorite cereals don't get sold here (Fruity Pebbles being the big one) but some of the cereals that have the same name are actually very different. Grape Nuts in Canada is not like Grape Nuts in the states. Which sucks because I liked the way they were in the states.
Soda isn't as big a thing here. It seems like people drink a lot less soda per capita than back home.
Same with smoking, I hardly see anyone smoke in Canada.
Anyway, these are just some things I've noticed.