*jmpey626: if you really want to see the difference, put 915 on one side of the car and KSG on the other side of the car and put it out in the sun, you notice that KSG reflects more light than 915 and 915 would be slightly darker, another thing you could do is at night hit different panels with a halogen lamp you should see the main difference in the reflection and in what we call halo's