Quickly Compare two MySQL databases

A very nifty and quick way to compare two mysql databases is to use mysqldump command. This also works well if you just want to compare DDL

mysqldump -d --skip-comments --skip-extended-insert -u root -p -h mysql.host db1  > db1.sql   
mysqldump -d --skip-comments --skip-extended-insert -u root -p -h mysql.host db2 > db2.sql   
diff db1.sql db2.sql