Another way to think of foams is that they are essentially the tire's air pressure. You want a softer tire for low grip and bumpy conditions so the tire can have a bigger contact patch and better bump absorbtion. A High bite surface needs a harder foam to support the tire under the higher cornering loads. Too soft a foam and the tire collapses under load.
"I have no idea what you're talking about, so here's a bunny with a pancake on it's head."
In mind and body, we're all heading towards old age. It is slower to go by bike.