An exo cage can get you caught up on a rock or a tree. Also they don't completely prevent damage to the body. They are fairly heavy. For all practical purpose and strong reinforced interior cage will give you great rollover protection for the family and they mount more securely than an exo. Look into 4innovations.com they have some of the best cages for 4runners. I believe that if your going to exo to avoid damage you might as well take the body off and put a ftoy chassis on if your worried about body damage. Its a part of wheeling.