Ultimately, my terrain drove the decision and their ability to forage. I also like the tamworth--but for my initial purposes the mule foot and I seem to the right fit. I also consider the breeds status with the conservancy. Critical get's more favor than threatened and so on...
Have you looked at the Pot-Bellied Pig Association? I have recipes for pasture based hog feed if that would be of use to you. I'm planning on bringing mule foot hogs to my property, hopefully next year.