Why is Americal Eagle costlier than Canadian Maple Leaf?

Considering the fact that Canadian Maple leaf is 99.9% gold and American Eagle is only 91.6% gold, I’d expect the maple leaf to be costlier.
I’m trying to find if the maple leaf is lighter than americal eagle – that is whether 1 troy oz is the gold content of the eagle and not the actual coin weight.
(I know this is the case with South African Krugerrands, but I’ve never bought american eagle)
Americal is a typo – I meant American Eagle

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