Darren made 765 rwhp with NO NOS. Clint made 765 rwhp with NOS. Darren has the larger A/R, that is why he made more power than clint did...
About the TQ question. The answer is very simple. The HKS twins are like a big single turbo, they have lots of lag but make mad top end power. Use the simple equation
HP=TQ(RPM)/5252
The laggy big singles (twins) will make lots of power up top but not so much TQ...