These are general purpose mixers: you can mix doughs, batters, sauces and a lot of other things with a countertop, stand, or floor-model mixer.
Commercial Mixers
These are dough mixers: if you have a bakery or pizza shop, and need a lot of dough everyday, these could be the commercial mixers for you.
Get bowls, whips, dough hooks, flat beaters, vegetable and meat grinder attachments for your commercial mixer.
A handy little tool to blend things like whipped cream or chop soft produce. Sometimes these are called immersion mixers.