The Factions will also have much better heel hold. I have both the Sphinx's and the Factions (for different boards) and the difference is very noticable. HOWEVER, the Factions require an additional piece in order to prevent the hinge from popping on tweaked out grabs or hardish landings. This additional piece is free from CWB (they have excellent service), and it does a LOT to stiffen the ankle support. If you want support though, consider the Zeus, and maybe look at last year's model to save some $$$.
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