F430 Challenge Cage

A question for any structural specialists. Are the F430 Challenge cars structurally different from the street model? What I mean specifically is are the body panels thinner? Do the Roof, A and B pillars torsional lean on the roll cage? Would removing the forward sections of the roll cage compromise the body of the car beyond that of a standard F430? In short, if you removed the cage from an F430 Challenge would it be any less capable than the street car, with all else being equal?