I suppose I'm late to the game here, but the difference between a colour stable and ceramic is heat rejection. Material cost is much higher, and it's a bit more of a pain to install.

We use XPEL window tint and it holds up pretty good. I have cs on my car and it's reduced the glare substantially. If you want to see how ceramic tint reacts to heat, you're welcome to come by the shop and see our display case. It's got a high wattage bulb in it and you can definitely feel a difference.