I wouldn't be surprised if each of the frontier American labs and individually has compute access similar to the entire EU. Chinese firms are a more interesting comparison since there are a fair amount of great models there, and it's estimated about 15% of the ai relevant compute is in China versus maybe 5% in the EU under European companies (and 70% ish in the US is the most common ballpark I see)
I think you are underestimating the amount of compute the US frontier labs have access to.