When i moved from a traditional hot end to the e3d i was able to cut my ooze control settings in half. The hot zone on the e3d is so sharp and short its not funny. I have way better control with it. I dont know how it compares to the hex however. As for the ptfe, its not in the hot zone so neve gets exposed to real high temps. I had an all metal v5 and i can say the ptfe liner is way better.