There are several lumped into that group. The Am Staffs look most like boxers. This site has some comparative information, but there is overlap here as well.

There is a strong prey drive and they're really possessive about food, but a lot of dogs are that way. These guys just excel at it. The funny thing is, the pit has been snapping at the catahoula for the most idiotic reason this week--the katydids are out. And this dog, who was stray for weeks before she ended up at my house, apparently cultivated quite a taste for springtime bugs in the time she lived in the prairie and woods across the road. Katydids are her absolute favorites and if Poppy gets between her and her bug, look out! (She is incredibly apologetic to Poppy once she has pounced and devoured her bug.) I've noticed quite a few over in a corner of the yard where both dogs like to hang out, around some bushes outside my bedroom window. I heard a fracas this evening and they'd been duking it out in the rosemary bush. When I called them over they both came quietly, and smelled heavenly. :)

SRS