The Cougar is actually the model thats made by Force Protection. They make them in Ladson, SC. I see them a lot since I work around the area and live here. You can tell the difference by the grills pretty easily. International keeps their grills that you see on their trucks, but the FP ones are different.
They are the heavy armored personnel carriers that they have been sending to the Marines and such and have supposed to have worked out pretty well.
I guess the International brand makes sense since there is a plant about 7 miles from where this was taken and I can see the emblem. My uncle actually works there so I need to pick his brain a little to learn more.
the majority of the MRAPS being produced these days are based on heavy truck designs with modifications. the south africans have been making these for years and pioneered the v-hull design specifically to deal with mines and other types of IEDS.
probably depends on the manufacturer. some of the designs i've seen leave the running gear exposed so they will take the brunt of an explosion. protect the crew, blow off a wheel and still be able to drive away from the contact area.