Whats the difference between grace and amazing grace?

Amazing Grace is a song. there are , in different faiths , different types of Grace such as sanctifying, saving, etc, all supernatural. it was a joke at the pharmacy of a church operated hospital to ( get 300MGs of Saving Grace) that"s more than you will find in some people! By the way the song was written by a man named Newton ( not the scientist) and was based on his personal experience as an ex-slave trader and something of a Buccaneer type. as a kid when I first heard the song I thought it was more or less a musical autobiography of Saint Paul as it is entirely in synch with Paulist theology. Grace is undeserved favor or merit. Amazing Grace is a song that speaks of the amazing grace of forgiveness of sin God has given his obedient children. grace can also be a name.. my name is grace ^^