Write SQL query to solve given problem: How many more papers in total were published in the journal "Cases Journal" than in the journal "Molecular Brain" in percentage?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT SUM(CASE WHEN T1.FullName = 'Cases Journal' THEN 1 ELSE 0 END) - SUM(CASE WHEN T1.FullName = 'Molecular Brain' THEN 1 ELSE 0 END) AS DIFF FROM Journal AS T1 INNER JOIN Paper AS T2 ON T1.Id = T2.JournalId