Of course there are a lot of aspects, were the two situations are different. But I did clearly state that the parallels are "in terms of GDP and population prop

Of course there are a lot of aspects, were the two situations are different. But I did clearly state that the parallels are "in terms of GDP and population proportion", which are two major general numbers typically used to sort countries into categories. Cuba has aprox. 12 times less people than Mexico and its GDP is aprox. 7 times less (but twice as much per capita). So you would need between 7 and 12 Cubas to join the USA to make the comparison working. My only point was to find an analogy that illustrates the approximate order of magnitude.