Brad, I know a guy or two that use them but they are on heavier cars so I am not sure if the inflation would be meaningful.
If it were me, I would put 14 psi in both of them and do a burn out. Then look at the stripe and see if it is evenly black all the way across. If it is, I would call it good and worry about what flavor of sno cone I was going to order at the concession stand. If not, I would adjust the pressure using the old standard. Blacker in the middle means too much air pressure and take a pound out. Blacker on the edges, not enuf pressure and add a pound.
Adjust until the color appears even all the way across and call it good