Write SQL query to solve given problem: What is the difference in population between the two nations where the tallest peak is located?. Keep the solution inside sql tag ```sql [SQL-Query] ```
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 )