While both are utility wagons, the traditional SUV is usually a tall, truck-based, body-on-frame vehicle. Some refinement is traded for capabilities such as high tow ratings or off-road performance. Crossovers, or CUVs, are unibody vehicles that offer a more car-like ride and better fuel economy without sacrificing cargo space. They generally have lower towing capabilities than standard SUVs. We cover crossovers in our reports on small SUVs and midsize SUVs.