Show the columns that are missing from 'owner1' when compared to 'owner2' for tables that match the prefix

gistfile1.sql

SELECT table_name, column_name, data_type FROM all_tab_cols
  WHERE lower(owner)=lower(:owner1)
  AND table_name LIKE :prefix
  AND column_name NOT LIKE 'SYS%'
  AND table_name||'-'||column_name NOT IN
    (SELECT table_name||'-'||column_name FROM all_tab_cols
      WHERE lower(owner)=lower(:owner2)
    )
ORDER BY table_name, column_name;