Badger 5xp
This garburator is the loudest of the 3, a compact unit that gets the job done. It has a 3/4 hp motor but does not have any sound dampening properties.
Badger 444
This garburator is a medium duty unit, it is fairly popular for residential use. It is quieter than the 5xp with a 3/4 hp motor and sound insulation.