Just about anything to do with food is because Canadian versions (much like European versions) don’t have as many nasty ingredients. Just look up Canadian vs American Froot Loops as the most visually striking example (food dyes that are ok in USA but illegal in Canada & EU). I’ve heard Oreos taste completely different in The States too.
Just thought of another example… Americans driving south to get Mexican Coke because they were still using sugar cane instead of high fructose corn syrup.