When the US listing is an ADR it can make a big difference whether you buy that or buy on the home-country exchange. That’s because, as I understand, there’s a fixed set of shares bundled into ADRs and the number of such shares doesn’t generally change, so the ADR can be bid up higher, or drop lower, than the home-country price. For example, right now TSM ADRs trade at around 18% premium to the shares in Taiwan (ticker 2330); in recent years the premium has mostly been 5-10%.
But FRFHF is not an ADR, it’s just regular FFH.TO shares that have made their way to the US, so no such issue.