Question: How many more stars in percentage are there for the repository of solution "1" than solution "2"?
SQL: SELECT CAST(SUM(CASE WHEN T2.Id = 1 THEN T1.Stars ELSE 0 END) - SUM(CASE WHEN T2.Id = 2 THEN T1.Stars ELSE 0 END) AS REAL) * 100 / SUM(CASE WHEN T2.Id = 2 THEN T1.Stars ELSE 0 END) FROM Repo AS T1 INNER JOIN Solution AS T2 ON T1.Id = T2.RepoId