Done both, and both were very much worth doing.
If you and your adult boys are into Disney lore, history, and are interested in gaining insight into MK inner workings, then I would do Keys. I frankly dreaded it and wondered how they could possibly keep my interest and fill all of that time, but I loved it.
Trek was way cool as well, but far more of a "daring adventure." The meal was good, but nothing too exotic (chicken maybe?). The pavilion we ate at was in a cool location away from the road. If your group is more into adventure, then this might be for you.