I think China would win. They simply have SO MUCH more electricity build. They are constantly bringing more online as well. They could capitalize on manufacturing and AGI with their technology would be able to do things in the physical world.
We don't do a lot of the essential manufacturing for those GPUs.
And AGI automates the US competitive advantage (white collar work). Plus we're gutting our universities and national science funding so we're losing that anyways.
As AGI will need a lot of GPU, which Nvidia lead in.
And a country with experience of ensuring they get the raw materials they need, even if they have to do a regime change by force.