Carnitas are fairly similar to fajitas.  The main difference is the meat used...pulled pork for carnitas...and the temperature of the meat.  The pork can be hot, warm, or cold.  Usually carnitas use fresh veggies like slices of onion, tomato, and avacado along with a squeeze of fresh lime over the top while fajitas tend to use grilled veggies, guacamole and sour cream.  Both use pico de gallo.

Don Pablos has a pretty decent carnitas plate...about as good as you'll find in Minnesota.  It'd be better if they used smoked pork but they are still quite enjoyable.