The two countries will, thus, have the same rate of growth of total income because they have the same population growth and technological progress. Hence, output per efficiency unit of labor in the steady-state will be the same in both countries. Thus, the level of income per worker will be higher in the country with the more educated labor force. But the MPK depends on the capital stock per efficiency unit of labor. Thus the real rental price of capital is identical in both countries.
Output is divided between capital income and labor income.
MPK x k. Therefore, the wage per efficiency unit in the two countries is equal. Workers, however, care about the wage per unit of labor, not the wage per efficiency unit. Another growth model question. This is easy to find in your text.