TRD Sport

Help - I just purchased (although haven't taken it off the lot yet) a 2006 TRD sport, I wanted a TRD off road, but I liked the look of the sport and several salesmen walked me through the equipment list and said it is the same other than the limited slip differential overide on the off road package. However, whenever the literature refers to sport is mentions sport tuned suspension and the off road says off road tuned suspension. Can anyone please walk through the differences between the two packages from the point of view of their off road capabilities. While I am not a fanatical off roader, neither do I want a highway truck that is also a 4x4.