The difference in cybersecurity risks between the United States and a third world country
The biggest difference between the United States and other countries is the relevance in global politics, technological standards, and history of cyber attacks.
If we were to compare the U.S. and a third world country, the U.S. is one of the most important actors if not the most important actor on the stage of global politics. A third world country still needs help to raise its presence and make itself a possible global power in the future. As a result, the U.S. is going to have extreme security measures and the third world country will have weaker security measures. In the eyes of someone choosing where to breach for data, there are downsides and upsides to both: it is harder to breach a U.S. company or government data source, and there are extreme repercussions for failing to do so. However, if the data breach is successful, the information at hand could be used to gain extreme political control, influence, money, or more. As for a third world country, it is easier to breach their information systems but the rewards are fewer. The method one might use would be patched immediately and it might be the last time they get an opportunity to breach anything relating to that country. However, it may be their only chance to gain any sensitive information compared to the U.S.
As for technological standards, this can go hand in hand with the first point of global politics: a country like the U.S. is going to have far superior defense systems compared to a third world country. American technology is only going to be rivaled by other first world countries. Because of that, there are less risks with American defense systems, but more risks in terms of people trying to breach it. As for a third world country, they are more at risk due to their lower technological standards.
The U.S. has an extensive history of cyber attacks. America has been seen as a global competitor with valuable information ever since the era of computers and digital information has been a thing, painting a target on their backs. As for a third world country, they probably have less history with cyber attacks, but are still at risks due to being easy to compromise.