I loved the Epidemic when it came out and had 2 of them... so when the Wrench came out, was curious to see how compareable these two were... Drilled 1 Wrench with the same layout as to one of my Epidemics and for me the Wrench is a little earlier with a stronger continuation through the pindecks than the Epidemic. So overall, the Wrench is about 4 boards stronger overall with a good amount of backend motion.

Therefore, I retired my Epidemics for the Wrench. Hope this helps your question!