North and South America are also colonies. Why is the later development so different?

Personally, I think that early North America was a colony of Britain, and South America was a colony of Spain and Portugal. Later, Britain defeated or surpassed Portugal to become the maritime hegemon. Triangle trade has brought a large number of laborers to North America and promoted the development of local economy. Later, the first industrial revolution also brought the latest technology to North America. Because the mountainous plateau in South America is different from the Great Plains in North America, it is not conducive to economic development.