what is the difference between the Adrenalin...
what is the difference between the Adrenalin and Endorphin?
which one is stiffer and ski's harder?
The Endorphin has carbon fiber in the heel, while the adrenalin does not, making the endorphin stiffer and more responsive. I have only skied the endorphin and it skis way agro. I have tried both boots on for a side by side comparison, and the endorphin is much stiffer.