SQL dumps comparison is quite hard to do when dealing with large amounts of data. I would try the following:

Import each SQL file data into its own database
Use one of the methods indicated here to compare database content (I assume the schema is the same). E.g. Toad for MySql
This way of comparison should be faster, as data manipulation is much faster when stored into database and also has the advantage the missing data can easily used. E.g.

SELECT *
FROM db1.sometable
WHERE NOT EXISTS (SELECT 1 
                  FROM db2.sometable 
                  WHERE db1.sometable.pkcol = db2.sometable.pk2)


OOO  O puedes solo usar text comparison al descargar toda la bdd... si pesa pocos megas es la mejor opción y rapida uanque cuestta un poco trabajo ver que columna cambio pero eso ya lo ves del otro lado en phpmyadmin