I doubt the overland concept was officially squatched. It had 2.3/manual. Mansquatch was announced around 21 Sep. Overland concept was displayed 7 Oct. Guarantee it was planned and/or assembled well before the 2 weeks between those dates.
The smaller engine would appear to be the difference. The rack can be added to 4 door builds that have the 2.3 engine.
What is the weight difference between the engines?