@Richie: That makes sense. My experience with using the harder closed cell foams like AKA reds is that you usually want to run softer suspension to compensate. Probably a bit less pack. The white open cell foams are like running pillows in your tires and running the AKA red type foams are a bit harder. I've found this is helpful when you have tons of traction though as in these situations the tire can tend fold over with softer foams.

side note I've found the pro line blue closed cell and j concepts also has a medium that are a little softer than the AKA. Also the panther orange foams are softer than AKA red it seems.