There is no logical difference. The differences between rich and poor countries are education, birth rates, property rights and their impact on wages.
In my original post I wanted to point out that the relationship between workers and capitalists is called exploitation, although we have similar patterns with other business relationships where nobody talks about exploitation.
Suggest an independent haircutter and you as a customer in terms of services. The haicutter cuts your hair. Your profit is a nice haircut, the haircutter makes a monetary profit. A capitalist hires a worker. The worker´s benefit is an income, the capitalist´s benefit is a monetary profit.