Why do they call them SUV'S when then vast majority of them are glorified station wagons? To me a SUV is a truck based full frame vehicle. Got to love marketing.
There is no industry standard for SUV or CUV. Differeent manufacturers, engineers, sales, marketing cannot agree, so neither can consumers. The vast majority of what I think the OP is calling SUV are unibody crossovers, or CUV. There are not many nameplates and sales volume that are actually body on frame today.