When one country was fully mobilized with a large army it could defeat a variety of enemies that are still on a peacetime footing, but so what? A year later, you've demobilized your army, the other guys have assembled theirs and you'd get a different result.
It's not really a useful comparison -- all the more so since by the time one army had fully crossed the Atlantic, the other probably would be mobilized and ready to fight.
cva thinks in relativistic terms so it’s easy to confuse him by lines of reasoning such as yours. Go easy on him ;’)