I think the expectation is that China is the one that would massively outproduce the US. And that our technological "advantage" is roughly that of Germany over

I think the expectation is that China is the one that would massively outproduce the US. And that our technological "advantage" is roughly that of Germany over the US in WWII (i.e. noticable, but not meaningful). We likely would be barely capable of a WWI performance as far as output..