To sum it all up, a stock GS-R will be slower than a stock ITR at the drag strip.
But you never know, someone like me could driving the ITR and Trey could be in the GS-R and whoop my ass. I could only manage a 14.6 in my ITR with I/H/E at the time. :a: Maybe I should learn how to launch.
Forgetting ET's since we all live at different altitudes (or planes of existence, etc), ITR > GS-R, when both are stock. Once you start to modify, all bets are off.