Wow, glad to see all the b16ers coming out of the woodwork
I don't quite get how the gsr was outrevving the SiR motor, unless it had some internals done to allow a higher redline.
As for the torque comment, yeah, of course, higher literage will cause more torque -- "no replacement for displacement" I can't remember the website, but it had a great text on how high torque isn't what you want on a dragstrip anyway, you want as much traction on the launch as possible.
Overall, the GSR is probably a better motor, but I wouldn't be so quick to discredit the SiR