The fact is that ride height is quite arbitrary as it does not take care of the underside shape of the car. Even if the underside is completely flat but has a diffuser , the venturi effect can kick in, in this case the car may be designed to work with the front a bit taller than the back. But the data available to us relate only to the available suspension travel in compression. Not much else unfortunately. What I mean in short is that you can think you are raising the front taller than the rear, but the car body could still appear to be lower in front (unless you go to extreme measures).