I'm not sure what you're saying... There's no point in making comparisons because the U.S. and Finland are different? Canada is much closer to Finland in PISA

I'm not sure what you're saying... There's no point in making comparisons because the U.S. and Finland are different? Canada is much closer to Finland in PISA rankings than the U.S., but probably has more in common with the U.S. in most respects than Finland. Of course, Canada is not Finland or the U.S., and what is good for Canada may not be good for the U.S. ... Seriously, look no further than the text-book industry in the U.S. It's a friggin' mess. If I were designing a curriculum in Canada, my #1 criteria for choosing a text-book would be "must not be used in Texas or California".