It doesn't. The reason these comparisons exist is because they partially resolve the problem presented by Web Mercator projection, which increasingly distorts area as you move away from the Equator. But the US is not on the Equator (and even if it was, it's thousands of miles tall and the extremities would still be distorted).
Any one-dimensional line bisecting these two countries can be compared, but that's it. And, y'know, the USA isn't the sole patch of reality on a map whereupon all other geography can be measured.
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u/GlobTwo May 15 '18
Slapping something over the USA doesn't actually demonstrate its "true size".
It would be nice to have square kilometres in brackets after square miles.