What is the difference in the Tst Powermax 3 comp vs the reg. TST powermax 3. I know there is a difference in H. P, but does it just defuel at higher rpm or what. I am looking at something to stack with my Smarty and sometime down the road F1 injectors. Im looking at Tst comp, reg Tst or edge comp. Which would be my best bang fo the buck, knowing i can find a used comp at a decent price vs spending double on the TST comp. Is it really worth that much money. Any input would help. Thanks Cole.