One of the major reasons high end sports cars do not use an aluminum trellis frame is weight. The design, while very strong and rigid, is relatively heavy compared to a monocoque aluminum/composite space frame commonly used. I would be willing to bet, in overall strenght, the trellis design would win out. Just look at the different applications. Super cars use a monocoque style frame, it saves weight and allows the use of engineering concepts like crumple zones. Compare that to say an off road truck, which has a much higher chance of rolling and tumbing, you can accept the higher weight for the likely steel cage for a frame