What is the difference in population between the two nations where the tallest peak is located?
SELECT * FROM mountain AS T1 INNER JOIN geo_mountain AS T2 ON T1.Name = T2.Mountain INNER JOIN province AS T3 ON T3.Country = T2.Country INNER JOIN country AS T4 ON T4.Code = T3.Country WHERE T1.Name = ( SELECT Name FROM mountain ORDER BY Height DESC LIMIT 1 )